There are always a few on craigslist here in southern california. Mostly combos, though:
http://sandiego.craigslist.org/csd/msg/5903609091.html
http://losangeles.craigslist.org/sfv/msg/5908367496.html
http://inlandempire.craigslist.org/msg/5892389453.html
Maybe better deals are available on ebay? Are you planning on a doom amp safari?
I'm willing to get into the import/export business and flood the down-under market with vintage Ampegs if you can hook me up with Australian citizenship. I'm already familiar with drought restrictions & wildfire prevention and need an exit strategy before inauguration day for the-orange-one-who-must-not-be-named.....