@roxy54 spot on. I like my BHK250, but don't think I could justify $32k or even $16k for the BHK300 new. Used sure, but they seem to overprice themselves a bit in their BHK line.
PS Audio BHK 600
Word on the street is that PS Audio has pre-full release offered their new BHK 600 mono blocks to existing customers. Looks like a P20 power conditioner without the display, so $0 spent on the external design and aesthetics (still ugly, unless you prefer the microwave look for your audio equipment). None the less, MSRP is $32,500.