In general, patience and luck can eventually get you one for cheap. Unless it's something super rare and sought after, like an apple 1 or voodoo 5 6000, every n

In general, patience and luck can eventually get you one for cheap. Unless it's something super rare and sought after, like an apple 1 or voodoo 5 6000, every now and then something like that might pop up at a Goodwill, local flea market, local electronics recycler, maybe even a smaller version of craigslist. But specifically buying these things from collectors or sellers specialized on old/vintage systems is usually quite expensive.