For example, some 20 Megabyte hard disk which still works but is the size of washer machine. This is stuff you find hard to dispose of.
There isn't much value in such things unless you need it to keep some legacy item running.
To make matters worse, if they pay you money they rightly want it to work and work for some amount of time. But the service life is long expired.
As such, I try the Ebay route and just dump it. Or I try the Freecycle groups.
Bob
If so, what type and how did you sell it? Asset management site? Ebay? Newspaper? Newsgroup/IRC/Forum?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic