Considering buying a used Gryphon Diablo 250

Revitalizing this old thread. I'd be interested in knowing what your friend sold his Diablo 250 for.  There's one for sale near me for $6k and I'm having trouble finding a solid sales history to know what these sell for on the used market. 

$6k sounds reasonable for a Diablo250 in good condition. The Diablo 300 will be north of $10K (without DAC or phono, more if it has either or both). The Diablo120 seems to go for about $7-8k.

I would seriously consider listening to the Diablo250, it's an excellent integrated and I doubt you'll find another $6k option that bests it.

I have a mint Gryphon Callisto 2200 that runs at 220v. It was serviced by Gryphon's factory before I got it. I want to change it's power voltage to 110v-120v. I lived in California. Can anyone direct me where I should go? My budget is $1.5K to $ 2K.Thank you.