I have been shopping at DVDOrchard for years. They offer a great range of dvds, blu rays, games and music for reasonable prices and cheap postage (sometimes postage is free if you order through their ebay store)! I like their range of fitness DVDs too.
They also have The Orchard Points programme which rewards customers who shop directly with them in providing points that can be redeemed against future purchases. In addition, each order delivered (for 3 or more non budget items) earns an entry into a quarterly draw for a prize of a $250 gift voucher.