When I started my own computer refurbishing business, in 2003, I started getting requests for CP/M, Z80 and DOS based 8086 type floppy only machines. These were getting hard to find as working models. I had to rebuild them, and reseat all the chips, and re-aline the drives. The CRTs usually had so much burn in that they were unusable. After making a few I had to readjust my prices, way up to more than what the new computers were going for. The clients never batted an eye, or questioned the price in anyway. Often they would want two identical machines. The clients didn't want to tell me what they wanted them for. And I could not give a warranty cause replacement parts were hard to find. One client did clue me in, that they needed this particular machine to run a legacy industrial press. I assume this was what the others wanted them for also. They had some mllion dollar machine with custom soft that was taylored to that computer.