Only the ones I have are cheap, the good ones are someplace else. ;-)

I still pick them up, every chance I get. They don't take up lots of space, they are not expensive (in most instances) and they are loads of fun from the old days.

Being in Wisconsin, my main sources are rummage sales, and resale shops. I've heard that the flea markets in Nevada are lots of fun and many casino items can be found there.