I get nothing but good deals on eBay and I've never been screwed. Once I bought a broken joystick, but I fixed it myself easily.
Bid what you want to pay. Once. Then walk away. You'll get an email telling you if you won or not.
If its a BIN and you don't like the price, then just don't buy it. Yes, it is just that simple.
No, seriously, it is that simple.
No, shut the f*ck up. It is that simple. "Sniping" is a crack head's concept. Just bid the max you will pay and learn later if you won or not.
I've been buying Neo Geo MVS mostly recently, nothing but deals. Rage of the Dragons for $26, Super Baseball 2020 for $18.49. I bought some games from a dude in Guadalajara for great prices. KOF 98 for $19.24, and Metal Slug 3 for $36.09. My trust in non-English speaking non-Americans was rewarded. Games were legit SNK, not conversions, and work perfectly.