Listed on craigslist Rochester/Buffalo but actually located in Niagara Falls, ON, Canada.
No price in the add, but I emailed the dude - he won't split the stack (sell the head only) so I'm out (like I was ever in, for what these things go for these days), but only wants US$2K - which is actually surprisingly good considering what just the heads go for these days (US$1.5 - 2K, though granted, demand may have been a tad inflated due to the whole Doom/Stoner guys getting into them in a religious way, but it looks like they succeeded in raising a lasting awareness of the awesomeness of these amps).
https://buffalo.craigslist.org/msg/5998229600.html