I've used it before Insider, it's very convenient, but there are definately some main things to keep your eyes open for.

Here is a useful guide written by 'PC Magazine' on eBay shopping:

http://www.pcmag.com/article2/0,1759,1543456,00.asp

Hope that will help!

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" God allows life to be rocky. His challenge is not to let the rocks grind you into dust, but to polish you to become a brilliant gem. "