I haven't had much luck recently, but here's my recent finds.
From late last month, this cost me $3. It's a PS2 / Saturn / PC Keyboard controller adapter for the Dreamcast. I haven't tested it yet.
Sherlock Holmes: The Case of the Rose Tattoo (PC) - $3
The box is beat up and it had some tape all over, but I removed it. This is the second part in the series, so I'm glad to have found it.
Barbie Race & Ride - $1
Spec Ops: Ranger Elite - $2
Call of Duty: Modern Warfare 2 (sealed) - $1 (!!!!)
The Sims 4 - $2 (!!!!)
Don't judge me on that Barbie purchase. It was a buck! There were lots of other PS1 games but they were all missing the manuals so I only grabbed this one. Spec Ops and COD are from the same booth. The Sims 4 was a gamble, it was from a booth where they had lots of returned items from some store (slashed UPCs, opened discs) and I grabbed it just in case nobody activated the key. And I tested the key and it's not activated so I'm gonna trade it (and COD:MW2) for some Steam stuff. The Sims 4 sells for $40!
Don't get excited. These are all case and manuals only. I bought 'em for trading to people who might need them, they had quite a few more but they were damaged or torn beyond repair. $2 total.