I'd have guessed $10-12K but super sleuth Jb has been definitive.
I need to confess I've never met one. Back in the '90s when I subscribed to Guitar player magazine, they did a review in the Underground 30 which has left me unrequitedly tumescent ever since. They described an AC30 with more definition, dynamics and versatility than the original, and revealed a magazine staff in raptures. It was a contemporary of Trainwreck; in fact IIRC, the Trainwreck was slightly cheaper.
This was the really early days of botique amp builders. There was Trainwreck, Bruno, Diaz and this guy Randall Smith who was transforming Fender Princetons into weapons of mass destruction.
This one though, is very special. For his Anniversary run, Mr. Bruno pulled out all the stops. Each amp has components selected specifically for the build. Their valves come from several manufacturers, but all are unused vintage glass and matched for the amp.
These are spectacular sounding works of art and the amp equivalent of late 50's Gibson solidbodies.
And you've got one on your workbench!
I'm still tumescent!
Cowtipper's a big, clean beast I seem to remember; like a Steel String Singer?