You've put an item up for sale, the photo is fine, the price is reasonable, and yet nothing happens. The problem almost always comes from the text. On Leboncoin as on Vinted, the listing is the only thing that speaks to the buyer when you're not there. A vague title, a three-word description or missing information, and the buyer moves on to the next listing in a second.
The good news: a listing that sells always follows the same recipe. A precise title, a fair price, a description that answers questions before anyone asks them, good photos and the right keywords. In this guide, you'll see what makes the difference between a listing that sits idle and a listing that triggers messages, then three concrete methods to write one, from the fastest (with AI) to the most manual. By the end, you'll know how to produce a ready-to-publish listing in a few minutes.
Why Most Listings Don't Sell
Most listings don't sell because they describe an item instead of making people want to buy it. The classic mistake is writing what you see ("grey sofa, good condition") instead of writing what the buyer is looking for: the dimensions, the brand, the year, the reason for the sale, the real condition and what's included.
A buyer who's on the fence always asks the same questions. Will it fit in my place? Is it really in good condition? Why is it being sold? Can I come pick it up this weekend? If your listing doesn't answer, two things happen: either the person messages you to ask (and many don't have the patience), or they give up. Every unanswered question is a sale slipping away.
The other big deterrent is a lack of trust. On a peer-to-peer platform, the buyer doesn't know you. A description that's too short or full of typos sends a negative signal, even subconsciously. Conversely, a detailed listing, honest about flaws and well written, is reassuring. Selling online is one of the simple ways to make money with AI without any technical skill, as long as you get this first written contact right.
The Six Ingredients of a Listing That Sells
A listing that sells rests on six elements: a precise title, a fair price, a clear description, good photos, the right keywords and a fast reply. Here's how to work on each one.
- The title. This is what decides whether someone clicks. Put in the brand, the model, the size or the colour, and a word that reassures. "Zara camel wool coat size M very good condition" beats "nice coat" every time. On Vinted, brand and size are essential; on Leboncoin, the brand and the exact model.
- The price. Look at what identical items are actually selling for, not the ones that have been listed for three months. A price 10 to 15% below the market sells fast. If you're open to negotiating, say so ("price slightly negotiable").
- The description. Answer the questions in order: what it is, the exact condition (including flaws), the dimensions or size, what's included, and the handover method (in-person pickup, shipping, location).
- The photos. Daylight, a neutral background, several angles, and one photo of the flaws. Visual honesty prevents disputes and reassures.
- The keywords. Think about the terms the buyer types. For a console, add "controller", "cables", "original box". These words help your listing rank higher in search.
- Responsiveness. A reply within the hour multiplies your chances. On Vinted, sellers who reply quickly are ranked better.
Once these six elements are in place, writing only takes a few minutes. All that's left is choosing how you produce the text.
Method 1: Write Your Listing With Skilzy's AI
The fastest way to get a ready-to-publish listing is to have it written by a guided agent in Skilzy's AI Lab: you answer two or three questions, and it writes the full text. No need to know how to phrase a prompt — the agent asks the right questions for you.
Skilzy is a French platform for learning and using AI in everyday life. Its AI Lab integrates the real tools with credits included, so you use AI directly within the platform without stacking up subscriptions. For a listing, you pick the matching guided agent, you give it the item, its condition and its price, and it hands you a catchy title plus a structured description, with the keywords already in place.
The path in the app: you open the AI Lab, the Home tab, the Guided section, then you select the writing agent. It asks two or three questions (what are you selling, what condition, what price, what handover), and it writes. You review, tweak a detail, and publish.
You can try it without a credit card thanks to the discovery demo: 7 days with 1 image, 1 video, 1 track and 10 messages. That's plenty to write several listings and see the difference. After that, the plan starts at €29.90/month with no commitment, with two state-recognised certifications that can be funded if you want to go further.
This approach really pays off if you sell regularly, for example in buy-and-resell or serious closet clear-outs. It's also a directly monetisable skill: writing listings and product descriptions for shopkeepers is one of the services covered in Skilzy's AI freelance programme, which shows how to turn these routines into income. If the topic interests you, our article on becoming an AI freelancer breaks down the services to sell and the going rates.
Method 2: Use a Free AI Tool Like ChatGPT
You can also write your listing with a free AI tool like ChatGPT, as long as you give it a good prompt. The free version is enough for this kind of short text. The only work on your side is describing your item well, because AI can't guess what it can't see.
Here's a prompt template you can copy and fill in:
Write a for-sale listing for [Leboncoin / Vinted]. Item: [name, brand, model, size or dimensions]. Condition: [new, very good, good, with these flaws: ...]. Price: [amount], negotiable or not. Handover: [in-person in ..., or shipping]. Give me a catchy title under 60 characters, then a description of 4 to 6 lines, honest, with the useful keywords for search. Warm and direct tone.
The upside: it's free and available everywhere. The limits: you have to open an account on a separate tool, copy-paste the result over to your platform, and you're stuck writing the prompt yourself each time. If you're churning out lots of listings, it gets repetitive, whereas a guided agent already does the formatting work. To go further with this kind of routine, our guide on AI workflows for creating content shows how to save time on your texts in bulk.
Method 3: Write Your Listing by Hand With a Template
If you'd rather write everything yourself, a five-block template is enough to structure an effective listing. No AI needed: you just fill in each part in order.
- Title. Brand + model + size or dimension + condition. Example: "Rockrider 27.5-inch mountain bike very good condition".
- The item in one sentence. What it is and who it's for. "Full-suspension mountain bike, ideal for trails and the city."
- The condition, honestly. "Very good overall condition, a few tiny scratches on the frame, brakes serviced in June."
- The practical details. Dimensions or size, included accessories, year, any warranty.
- The handover and contact. "In-person pickup in Lyon 3e or Mondial Relay shipping at your cost. Available in the evenings and on weekends."
This format works because it answers the questions in the order the buyer asks them. Keep sentences short, avoid all-caps everywhere (it feels like shouting) and proofread for typos. A hand-written listing can sell perfectly well; it just takes a bit more discipline so you don't forget anything.
Adapting Your Listing to Leboncoin or Vinted
Leboncoin and Vinted don't expect the same listing: one favours the item and the price, the other fashion and trust between members. The same text copy-pasted onto both platforms will rarely be optimal.
On Leboncoin, you sell everything (furniture, appliances, tech, cars, fashion). The buyer often searches locally, in-person pickup is the norm, and price matters enormously. Bet on precise dimensions, a well-chosen category and a clear location. The platform's posting rules require listings that are accurate and not misleading; you can check them in the Leboncoin help centre.
On Vinted, it's mostly fashion and accessories, with a buyer-protection system and reviews that build your reputation. Here, brand, size and condition come first, style hashtags help you get found, and shipping is built in. A slightly more personal tone works better ("worn twice, too small for me"). The best practices for descriptions are explained in the Vinted help centre.
In practice: keep the same base of information, but reorder it. For Leboncoin, the title leads with the item and its key feature; for Vinted, the brand and size go first. This adaptation logic is exactly what AI does well: you give it the info once, and it produces two calibrated versions.
Conclusion
A listing that sells is nothing mysterious: a precise title, a fair price, an honest description that answers questions, good photos and a fast reply. You can write it yourself with a template, hand it off to a free tool, or produce it in a few minutes with a guided agent. Pick the method that suits your pace, test it on one item, and watch how many messages you get. The difference is often visible within the first week.
