one to two thousand bucks. It has followed the Astatic JT30 and vintage p.p. tube audio amps into the realm of audiophoolery.
They could probably get the same sound with an equalizer set as a bandpass filter and an old compressor.
If you can get a grand for it, Bruce is right, you are better off getting a used 222 or CRL PMC 300, 400 or 450 and pocketing the difference.
you can recap it with "hi-fi" electrolytics
and orange drops and maybe get another $500 for it. Unless the phools think the old ones sound better