[hh22]

This may be a technical problem, but it's hard to really know the best price of a book when you exclude used books from third-party sellers. For example I found a $70 book that was in the $60 range on a foreign site, but then if you clicked through on the US site you could find one for $45 that was slightly used. Without that kind of contextual information the site is less useful.

[aeurielesn]

It may be less useful for your particular case but I found it an amazing tool. I want new books and I didn't know that the German site had the book I was looking for in half the price although three weeks delivery at most.