That's remarkably pricey given what's in the machine. Were 68000s made of solid gold in 1982 or something?
It wasn't just the CPUs, 16-bit peripheral and support chips were very expensive at the time due to low volumes (that's why IBM went with the 8088 for the PC, high-volume 8-bit support chips were cheap). Also the concept came with networking and the ability to boot from network standard. Networking typically added $1000 to the price of a computer at the time; whether it was really justified or a case of charging what the market would bear is up for argument. The price was high, but probably not ridiculously high for a 16-bit workstation with bitmapped graphics and networking in the early '80s.