Hi,
I've been enjoying reading the very useful posts on this forum.
I've read quite a few but surely not all.

My question is about shopping sites and PPC. I have a long list of sites I could PPC on like Shopzilla, Shop.com, Amazon, Pricegrabber, Shopping.com and many others. I've been hesitant to throw money at all of these. Can anyone help me understand the value of these sites for my online niche clothing and gift store?

Thanks!