Back in the day, the formula for an EBay sell-side scammer was to:
1 - Setup a phony account, or network of accounts.
2 - start selling small value things to each other. (Postcards, keychains, digital pictures, etc) Leave positive feedback, including nonsensical feedback (ie. My laptop works great, A++++ for a $0.99 recipie).
3 - Wait a few months for the active links to the auctions to be de-activated by EBay
4 - Start selling a dozen high-value items like laptops. Ship nothing or empty boxes.
5 - Withdraw funds asap.
Now the same scheme works, but only in reverse for high-value items that have immediate cash value.
Solution: Never use EBay for anything.