[quote name='akilshohen']Circuit City for the glitches[/QUOTE]
Ooh, that's right - the Buy 2 Get 1 free $19.99 and under glitch was early 2006, wasn't it? (Buy 2 $2 clearance games, get a $19.99 game like Lego Star Wars or DMC3 CE for free).
However, CC went WAY downhill in my mind after that - a somewhat meh summer sale followed by nothing all Fall/Winter. Kmart has been my best source for clearance games. I have a hard time calling any of them "best" though. I would even throw EB in there just because I found one with a cool manager. But I also considered putting them under worst for general principles as well

. TRU has been OK but ever since they got rid of green tag clearances they haven't been so great either. Best Buy is nice for the recurring $5 off any game coupons, but not for much else. Target has been much worse since they started removing games after 75% off and sending them to Goodwill (no more games for $2 at 90% off like in 2005).
Gamerush would have gotten my vote for sure if they didn't start failing to get games in towards the end of the year (with the final straw being that they never got a Wii or even accessories and haven't to this day).
My votes are probably Kmart for best (due ONLY to the clearance pricing and selection) and Walmart for the worst. EB has been very up and down for me (sometimes the greatest, sometimes not so much).