I don't believe that I would feel confident buying a bow on ebay - REGARDLESS of if I was new to the sport or not.

I dont know how that bow was handled,
and I don't know what happens to the warranty,
and I don't know the person I'm buying from,
and I don't know what to do if I get the shaft.

If I got screwed over - I would really think that it was mostly my fault for putting myself in that spot, ya know?

Support your local bow shops...you'll be happier, and more confident in your purchase for sure.