I had another good gamestop score during these past two weekend's B2G1 sales.
Last weekend I was able to find: Again, Dementium the Ward, Professor Layton and the Curious Village, Elite Beat Agents and two impuse buys, Professor Layton and the Unwound Future and Trauma Center Under The Knife 2.
This weekend I was able to pick up Solatorobo Red The Hunter, Tony Hawk American Sk8land (really hard to track down for some reason), and Monster Tale for $20. I also had a B1G1 coupon from PUR rewards so I got Chrono Trigger and Professor Layton and the Last Specter for the price of Chrono Trigger ($19).
I almost have all of my list and then some.
So after looking through my purchasing sources, I'd have to say GS was the best, even if they didn't have a B2G1 because most of these games were $10 or less. Ebay was 2nd since I was able to grab several games in $5 auctions, plus some even came complete. Flea market was 3rd since they had good prices on otherwise expensive games. Amazon/AWD was last. Their prices weren't the best, and GS usually beat them. I'm sad that Best Buy wasn't even in the running, their online/in store used DS game selection is crap.