https://victoria.craigslist.org/ele/d/duncan-vintage-tektronix-collection/7322935080.htmlvictoria, BC
I believe it is still up for grabs, said to be the largest collection seen to date.
But the price is so low.
Vintage Tektronix Collection - $1,234 (Duncan)
I want a better (faster) 500, myself. rackmount if possible but they are quite hard to find any more.