competitive selling marketplace seller's playbook

how to price, list, ship, and operate so your stuff actually sells — at the price it deserves · last updated 2026-09-29 · ← back to alan's sites

overview

Marketplaces don't reward the best product. They reward the seller who prices on sold data, lists so buyers can find it, ships fast and cheap, and protects their seller metrics. Do those four and you beat 90% of casual sellers — whether you're moving enterprise networking gear, a piano, or a drawer of old RAM.

price on sold data, not vibes

Active listings are asking prices — fiction. Sold listings are the market. Before you price anything:

real example: selling an enterprise access point? "Aruba AP-655" as an exact model number in the title sells to buyers searching that part. "Wifi access point, great condition" sells to nobody. Model numbers are the whole game in tech gear.

listings that convert

titles are search queries

eBay gives you 80 characters — spend them like money: brand + exact model + key specs + condition. "HPE Aruba AP-655 WiFi 6E access point, tested" beats "great wifi ap". Front-load the words a buyer would type.

photos do the selling

8–12 photos minimum: front, back, ports, labels/serial plates, and every flaw close up. Daylight or white background. For gear, one photo of it powered on is worth a paragraph of description. Flaw photos build trust and kill "not as described" returns.

fill every item specific

Brand, model, MPN, condition, connectivity — eBay's filters run on item specifics. An unfilled specific is a buyer who filtered you out. Copy the specifics from the best-selling comp listing.

fixed price vs auction

Commodity gear with known sold prices: fixed price, always. Auctions only for genuinely rare items with uncertain value — and start them at the lowest price you'd accept, not $0.99 theater.

shipping without bleeding margin

real example: a 3 lb access point ships USPS Ground Advantage for roughly half of Priority Mail on Pirate Ship — same 2–5 day window for most zones. Check both before defaulting to Priority.

the seller machine

repricing cadence stale listings rot

Review every listing older than 30 days: drop the price 5–10%, refresh the title, or end and relist to reset search freshness. eBay's Markdown Manager (Seller Hub > Marketing) runs scheduled sales without touching your base price.

promoted listings use surgically

Start at 2–5% ad rate on slow movers only. Never promote your best sellers — they sell on their own and you'd just pay eBay a cut for nothing. Kill any promoted listing that gets clicks but no sales after two weeks.

protect your metrics top rated seller

Defect rate, late shipment rate, and tracking-valid rate decide your search placement and your 10% final-value-fee discount. One "item not as described" case costs more than the refund — photograph flaws, describe honestly, ship on time.

cross-listing one listing, many markets

Tools like Vendoo and List Perfectly push one listing to eBay, Facebook Marketplace, Mercari, and more — with auto-delist when it sells somewhere so you never double-sell. Worth it past ~20 active listings; below that, manual cross-posting of your best items is fine.

returns accept them

Accepting 30-day returns costs you a few return labels a year. Fighting returns costs you defect-rate hits, negative feedback, and hours of messages. The math isn't close — accept returns, price 2% higher to cover it.

mistakes that cost money

The expensive errors are all avoidable. Run this list before every listing goes live.

tools

ebay seller hub

free — listings, orders, metrics, and Product Research (Terapeak) under the Research tab.

pirate ship

free — cheapest USPS & UPS labels with no markup, fees, or monthly cost.

vendoo

cross-list to 10+ marketplaces from one dashboard, with auto-delist on sale.

list perfectly

cross-listing built for high-volume sellers, with bulk editing and delisting tools.

usps

free Priority Mail boxes and scheduled pickups — stop buying boxes you can get free.