I am both a buyer and seller on Ebay.
I have never had any trouble getting ripped off. My biggest problems have been with idiot, non-professional sellers who don't know you can't pack 8 glass plates in a box with 2 pieces of newspaper for "padding" and ship them and expect them to arrive in one piece.
Other than that, snipe away.....
I used to have a program that would provide me with the capability of sniping bids, but my equipment wasn't fast enough!
And for that reason, so is anyone who lists an item at less than they're willing to sell for. But listing at realistic prices just runs up the EBay fees because no one bids. EBay is not a place for the naive.