Most people here seem to purchase from amazon, I know I do all my purchases from there personally. Also have a prime membership, which means free 2-day shipping on almost all of them.
This. The convenience and selection is hard to beat. You can usually find a dollar or two cheaper price on any given title if you shop around, but if your volume of buying justifies Prime, you'll come out way ahead with Amazon.
Thanks for the info, guys!
I'd like to add for offline purchasing, check out walmart. They usually have $5 BR specials. For about a week after boxing day there were an aisle of BR ranging from $5 to $20