[Neko]

Thanks for your help. Yeah, I would be generating revenue only through affiliate programs, and maybe adsense and not handling any of the actual transactions myself.

I (perhaps naively) thought that my users could enter the product/keywords into my site and I could somehow do a realtime search of the major sites in my niche and return the price from each of them. The user could then click on the link (including my affiliate info) wherever the cheapest price was and make the purchase there, hence generating me affiliate revenue.

If you look at the site anybook4less.com and search for "theory of poker" it returns all the prices for the theory of poker from amazon, barnes and noble, books a million etc. Are you telling me that all of that data is stored locally in a database on the anybook4less.com server?

If so, you're right that is a much bigger task than I had thought.

Thanks again for your help.