Very Cool! A quick search looks like the Printers start about $2,000.00- $3,000.00 upwards of $8,000.00- $10,000.00.
Our machine would glue thin sheets of paper, layer by layer, and cut them with the outline of the part, plus a grid pattern on the non-part. After finishing all the layers, you'd pick off the non-part with a dental pick, leaving the part. The resulting model felt basically like wood. It was difficult to use for hollow objects because you could not get inside to pick out the hollow.
Mine broke and I called MonoPrice. They directed me here. I printed it (used a clamp to hold the broken one) and it worked flawlessly. Ran it at 0.2 layer and 75% fill 205C and 50C. Currently making a spare! Thank you very much!
As it becomes common to own a 3D printer, I can see the manufacturers selling the downloadable plans for the parts and having less inventory of small reproducible parts.