eBay? How about this for the one that got away. I saw a Vision Mantis (the best PCB inspection scope on the market) in perfect order complete with different magnifying lenses, which retails for around $4,000, sell for $220 at Grey's Online. Good second hand ones if you are lucky go for around $1500. I was spewing. The SOLD ad was an artefact from about 3 weeks before so I missed the boat. I was spewing.
It reminded me when I was into PC's not long after they first were released by IBM in 1982. I saw a PC-1 at an auction house in Niddrie (model prior to the PC-XT) in 1983, complete with a hard disk for $200. The new cost was around $7,000... in 1983 dollars!... today's equivalent of about $30,000. Reason it was sold cheap - no one knew what it was, except me.
The problem with eBay, is the average Joe Blow knows what a computer is these days and every one uses it. If that Mantis was on eBay, he would have gotten >$1,000. Another good alternative to eBay is Gumtree in Australia. For ham radio equipment the best is the VKHAM website.
Footnote: If anyone has used a Mantis for inspecting SMT solder joints or PCB tracks... it is a pure delight to use. You would never use a normal microscope or cam based scope again.
cheers,
Dave