I agree that you should definately check their feedback and make sure it is really high, like 98-100%.
Also ask for addition photos of the item if you wish to see more details...
A lot of sellers start their auctions at 99c, because its cheaper for them to do so, and people are more likely to bid. So if you can pick something up so cheap then its great luck for you!
Also make sure you are aware of how much you have to pay for postage, as sometimes that can be more that what you pay for item itself.

Goodluck, I hope you get some bargains!