I've been using biblio.com for the last year or so. I don't really know how it works, but lots and lots of independent bookstores sell books through it.
I have no idea, the whole thing's pretty opaque. You'd think they'd all want to be on all the 'aggregator' sites.
Sometimes I've been able to get a better deal going directly to the site of the bookseller. Biblio will have a lower price but higher shipping than on the seller's site. Not always though
