Best I've ever found at a thrift store was a Commodore 128D & An Atari ST.
Best yard sale find I ever had was an old lady selling a Vextrex in the original box with almost every game made for it. She only wanted $1 for it!!
I've been "thrifting" fairly heavily since the 90s from NJ to OH to VA, and I've never seen anything Amiga.
