It is the law of supply and demand. Do a complted items search on Ebay for those items to see what they sold for. Also a place called Electrical South may buy them. They selll and repair Bridgeport boards.
There are a lot of 2.5 axis CNC machines out there doing 3D work. A program is posted on a PC and DNC to the mill. I have many mold shops in North Alabama doing this.