From my experience, the best prices for books and other resources in this field are Amazon or Christian Book Distributors. (And yes, I do have affiliate links to their sites.) With that said, I provide links for you to do your own price comparison. Amazon Marketplace often has good prices on (nearly) new books. I also use Book Burro. It is a Firefox browser addin that searches WorldCat for nearby books in libraries as well as cheapest online prices at a number of other online book sellers (e.g., Abebooks, Alibris, Buy.com, Half.com). I have had only positive experiences with this online retailers, but as always, you will want to check sellers' histories. And don't forget to check out your local stores as well!
CEV Learning Bible, Hardcover
By American Bible Society
NRSV HarperCollins Study Bible, Revised and Updated
TNIV Study Bible, Hardcover