We're down to one, and yes, most of the good test equipment is on eBay. Other geek gear, however, and cool parts, can still be found. Last time I saw an HP41CV, a classy old calculator from the days when H-P meant something. Perfect, with manuals. It went for $35.
My recent scores include a couple of 4 1/2 digit Fluke DMMs, working, dirt cheap, linear stepper motors, gear with 50G resistors & related teflon standoffs, electrometer amps, etc., (the latter items for a dollar)...
I don't really need much 'stuff' these days, but, like Home Depot, the wealth of raw and not-so-raw material still inspires all sorts of ideas. Fun.
Cheers, James