How to Sell Secondhand Online in Thailand: A Guide for First-Time Sellers
Updated 2026-08-13
Start selling secondhand online from zero: which items to list first, photos that actually sell, writing the listing, pricing it, and getting paid safely all the way to a closed sale.
Start with your easiest item, not your most expensive one
Most first-time sellers start with the most expensive thing they own, on the logic that it's the best use of their time. But high-value items take longer to sell, attract more questions, and get negotiated harder — which is why a lot of new sellers give up before their first listing ever moves.
A better approach is to start with things that have wide demand and a modest price: recognizable clothing brands, phone accessories, books, small homeware. Close two or three sales first so you learn the rhythm of replying to chats, arranging delivery, and getting paid. Then bring out the big-ticket items once your profile has some reviews and completed sales behind it — which is exactly what makes buyers comfortable committing to something expensive.
Photos decide whether anyone opens your listing at all
In the feed and in search results, a buyer sees exactly two things: your first photo and your price. That first photo does more work than everything else in the listing combined. Shoot in daylight near a window with the flash off, put the item on a plain light background, clear the clutter out of frame, and let the item fill it. That alone separates your listing from the dim shots taken on someone's bed.
Then cover the angles: front, back, brand or size label, whatever accessories are included, and — most importantly — close-ups of any flaws. New sellers often worry that photographing the scratch will kill the sale. In practice the opposite happens: showing damage plainly filters out the buyers who would have asked for a refund or opened a dispute later, so the people who message you are the ones actually ready to buy.
Write the listing so buyers don't have to ask
Listings that sell fast are the ones a buyer finishes reading with no questions left. Put the repeat questions in the description from the start: brand and model, real measurements in centimetres, when you bought it, how much use it's had, why you're selling, what's damaged, what's included, and the original price if you remember it.
If you're stuck on where to start, use the AI assistant on the listing screen — photograph the item and it drafts a title, a description, and a suggested price range in about 90 seconds. Then edit it to match your actual item. Don't publish the draft unread: the specifics like a particular scuff or a past repair are things only you know, and they're the part buyers care about most.
Price with room to negotiate, but not so much that nobody messages you
Before you set a price, search the platform for the same item and see what comparable active listings are asking. If you find several identical items priced well below yours, your listing simply won't get opened. Price roughly 10-15% above the number you'd actually accept, so there's room to come down — haggling is normal in secondhand, not an insult.
What to avoid is padding heavily: listing at near-retail and waiting for offers. Most buyers just scroll past without messaging, and a listing that gets no messages sinks further down the feed over time. If something has sat for two weeks with no chats and no saves, the problem is almost always the price or the first photo, not how many people saw it.
Get paid safely, and close the sale inside the platform
Once you've agreed on a price, close the sale through SOI Pay. The buyer's money is captured at checkout, so you know the funds genuinely exist before you ship, and you're paid once the buyer confirms receipt or the 72-hour auto-release passes after successful delivery. That removes the fake-transfer-slip risk entirely.
Be wary of buyers who push to move the conversation or the payment off the app, whether the reason given is convenience or saving on fees. Off-platform, you have neither a transaction record nor anywhere to escalate if something goes wrong. And after the sale closes, complete the order in the app so the sale and the review land on your profile — those two things are what make your next listing easier to sell.
Frequently asked questions
Does it cost anything to list an item?
No. Listing is always free and there's no cap on how many items you can post. SOI only earns a commission when an item actually sells, so you can list several things at once to see what gets interest without paying anything upfront.
How many items should I list when I'm starting out?
List 5-10 things at once rather than one at a time. Buyers who open one listing usually tap through to the seller's profile, and seeing several items raises the chance they bundle a purchase or come back later. A profile with a range of items also reads as more credible than one with a single listing.
What should I do when a buyer lowballs me?
Counter with a number you'd accept rather than refusing flatly or going silent. A lot of buyers open low purely as a test and move up once you reply politely with a reason — pointing at what comparable listings are asking, for instance. If the offer is genuinely too far off, say briefly that it doesn't work for you and move on; the listing stays up for everyone else.
Do I owe tax on selling my own secondhand things?
Occasionally selling your own used possessions is generally a different activity from trading as a business. But if you start sourcing stock to resell regularly, or the income becomes ongoing, your tax position changes. This isn't tax advice — if your selling becomes regular and substantial, talk to a tax professional or the Revenue Department directly.
