There's been quite a bit of discussion on these, search the archives here @ Agon. They are nice amps, average selling price for a pair would be in the $3000 - 3500 range. They were $7500/pr new in 1989 or so. No fan needed. Generally pretty excellent amps, better than some of the current CJ lineup in many regards. Definitely recommend getting the Bill Thalmann mods/updates done.
-Ed
-Ed