If you read that post, it gives some tips for thrift store shopping. I have found some of my most-played, best-loved games at these stores, including:
Piranha Panic- Good game for modifying for all goals. Each child picks a color of fish and try to get theirs upstream first. A lever is plunged if a piranha is rolled on the dice causing piranhas to pop up and eat the fish, which means you have to start again. The kids love this game.
Little People Playsets- Grabbed a farm set last year with animals and the farmer. Ohh, the language practice opportunities!
What are your favorite thrift store finds?