E-Bay auctions are interesting things. many people assume (incorrectly) that because it is on E-Bay, it is going to sell cheaper than they can get it anywhere else. I have been selling on E-Bay for years, and have seen items I am selling go for more than you can get them at Tractor Supply, Wal Mart, etc. I have sold a lot of industrial surplus for fair prices. I have sold a lot of golf cart and ATV tires, some go high, some low. The main thing about E-Bay shopping is you need to RESEARCH what you are looking for. Find the going rate in your area. Look on-line, don't forget to figure in shipping. Then you can do the on-line auction thing. I see used deuce items sell all the time for higher prices than Saturn sells them for every day.
Bjorn is definately right. I bid on 3 items one time, figuring I might get one of them. Guess what, I ended up with all 3. From different sellers. Plus shipping. Valuable lesson learned.