I would say because of the fact that they are no longer being made or serviced by the original manufacturer, the price should be in the range of $1,200 - $1,500 for a used unit in good condition. It's a great amp.
If you are in the US you might want to call Brooks Berdan in Monrovia, CA. They are a dealer but have a service department that has a lot of knowledge about BEL amps.
I would say about $1500 each. I would get a pair of monoblocks. The sound was way better than stereo, especially the huge soundstage of the monoblocks.
I have used them from MKIII all the way to MK V driving Thiels including the CS7.2. They are great amps. They were extremely reliable and never broke. Unfortunately the owner and designer passed away a few years ago.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.