Untapped second-hand markets

[Joan.of.the.Arch]

Are there some used/secondhand items that you know there is a market for, but that others may be unaware of?

Right now, I am wondering how I might find a second-hand adjustable/low temp electronics welding iron and the accoutrements that can go with it--welding station and so forth. I would like to get it as a gift for my son. He would use it as a student and hobbyist. I don't know enough about it to be a wise buyer, new or used. So if anyone has advice, please share.

But generally, what are some items you think are sellable used--items that many might not think of buying seconhand unless they are a particular fan of the category?

Something that came to my attention the other day when my neighbor was cleaning out his garage was WEIGHTS. You know, for barbells. He was going to sell them.

[disneysteve]

I think ebay, and later craigslist and freecycle, created a market for virtually everything. If somebody has it and somebody else wants it, those are the places to go searching. I know nothing about welding equipment, but a quick search on ebay revealed several welding irons (although all appear to be identical). With a couple million active auctions at all times, one can find just about anything on ebay.