Ask HN: Legality of price comparison scraping without permission

I'm building a price comparison website that allows users to buy the product without leaving my site. Is this legal to do? All the sites have standard EULA that says all content is property of site and cannot be used for any other purposes. We haven't asked them to use their content.

We're just going to be scraping the prices though. Not even the names/descriptions/images the sites use. We're using our own for that. Does this fall under the protection provided by Feist v. Rural? (http://en.wikipedia.org/wiki/Feist_v._Rural)