I own a Mac 512 K. I am thinking about whether to throw it away or to keep it hoping that someone would buy it as an antique or something in the future. Does anyone know if there is a market for it?
Not too much of one. Depending upon condition, you might get a couple of bucks from a collector, but that may be more effort than you are willing to put into it. If its still functional, you may want to hold onto it as Apple occasionally offers $50/$100 "trade in" value.
Only problem with that is if somebody's on eBay, chances are the computer they already own is better than a Mac512...