How to crosslist one item on many marketplaces without selling it twice

Prepare the item once

Before you open any marketplace, write the facts down in one place: what it is, the brand, the size, the colour, the condition, every flaw, your price, and what you paid. Take the photos once, in good light, and keep them in one folder.

Everything after this is copying those facts into forms. If the facts are complete, each form takes a minute. If they are not, you will go back to the item five times.

Know what changes from site to site

The facts do not change. The form does:

• The title limit. A title that fits one site is cut off on another. Write the long one, then shorten it per site.
• The category tree. Every marketplace names its categories its own way, in its own language.
• The condition words. “Very good” on one site is “Used, excellent” on another.
• The fee. Your price may need to be different where the fee is different.
• The language. A buyer on a German site reads German.

List where your buyers are, not everywhere

Three or four well-chosen marketplaces beat ten. Pick by the item: trainers and streetwear go to fashion marketplaces, furniture and bikes sell locally on classifieds, collectables go where collectors already search. For anything bulky, a local classifieds site in your own country usually beats an international one, because nobody wants to post a wardrobe.

Do not sell it twice

The moment an item sells on one marketplace, take it down everywhere else, the same day. This is the whole discipline of crosslisting.

Keep one list that says, for each item, where it is listed. A spreadsheet works. When a sale comes in, the list tells you which listings to end. If two buyers pay for the same thing, you will have to cancel one, which is bad for the buyer and for your standing as a seller.

Check before you press publish

Read each listing once before it goes live: the category, the condition and the price above all. A wrong category hides the listing; a wrong condition gets it returned.