Vintage Stock did me well recently. I have a 20% off new customer coupon I printed but hadn't used and it expires on the 15th so I gave them one more shot on Friday and found a DC game I needed (Ultimate Fighting Championship) for about $5 which was nice. Doing pretty good there, I think I've got just over 2/3 of the library, thankfully most of the expensive stuff is out of the way.
Then to my surprise I located a CIB copy of Ghouls 'n Ghosts for the Sega Master system. Got it for about $60 after the coupon which is a lot, but still pretty low for the US version. I may head back for a 16GB Vita card they've got, after coupon it'd be about $26. Not sure I wan't to spend so much in one weekend, I want to believe Vita cards will drop in price eventually.