The Short Answer
If you sell a wide variety of items — electronics, collectibles, vintage goods, parts, pretty much anything — eBay is your best bet. It has the largest buyer pool and the most flexible listing options. Poshmark is great for clothing and fashion accessories. Mercari is solid for casual selling of everyday items. Most serious resellers end up on eBay because the ceiling is higher.
Fees Comparison
Let's talk money, because fees eat into your profit on every sale.
- eBay — 13.25% final value fee (most categories) + $0.30 per order. Store subscribers get lower rates. No listing fees for first 250 listings/month.
- Poshmark — Flat $2.95 for sales under $15. 20% commission for sales $15+. Simple but high.
- Mercari — 10% selling fee + 2.9% + $0.50 payment processing. They recently changed their fee structure, so check current rates.
Buyer Audience & Categories
eBay has 132+ million active buyers globally. That's an audience no other reselling platform comes close to. Poshmark's audience skews heavily toward women's fashion — about 80% of sales are clothing, shoes, and accessories. Mercari's audience is more casual. It's great for decluttering but less ideal for niche or high-value items. If you're selling vintage video games, car parts, or collectible figures, eBay is really the only game in town.
Listing Experience
This is where the platforms diverge the most. eBay's listing form is powerful but notoriously tedious — titles, descriptions, item specifics, shipping options, return policies. Poshmark keeps it simple: photo, description, price, done. Mercari lands somewhere in between. The trade-off is control: eBay gives you more knobs to turn, which means more optimization potential but more time per listing.
This is exactly the problem AIAL solves. You get eBay's powerful marketplace with Poshmark-level simplicity — just upload a photo and the AI handles the rest.
Shipping
eBay gives you the most shipping flexibility — you set your own carrier, rates, and policies. Poshmark provides prepaid USPS labels (flat rate based on weight), which is simple but can be expensive for light items. Mercari offers prepaid labels too, with more carrier options than Poshmark. For sellers shipping high-value or heavy items, eBay's flexibility is a significant advantage.
The Verdict
For most resellers, eBay should be your primary platform. The buyer pool is massive, the categories are nearly unlimited, and the tools available (including AI listing tools like AIAL) make it possible to list at scale. Use Poshmark as a secondary channel if you sell fashion. Use Mercari for quick, casual sales. But if you're building a reselling business, eBay is where the volume and money are.