Selling? Not really. I am quite happy with everything I have sold. Even if I could give something away, I prefer not to. It's not the money. I believe that what something is worth to someone is reinforced by their willingness to pay for it. Of course there could be scrappers. But anyway, someone who pays is someone who treasures.
I had a pair of Apple II drives. No Apple II (lol). Never really figured on what I might do with them, but they sat for so long it was time - I really wanted them gone, and I found an eager market. They weren't perfect by any means, but they quickly sold anyway for asking price. Especially the black one. Apparently that guy just collects ALL Bell & Howell Apple stuff, even if it's somewhat beat up.
I sell the things I can't make use of. I listed some NuBus cards. I don't know if I have a NuBus slot anywhere (or why that would matter). Just want the clutter out so I can focus on the good stuff.
I was theorizing the other day about the Bernoulli drive. Can't really think of anything more useless. It's cool I guess - I've never even seen it running though and I'm ready to let it go. Frankly, it's Apple equipment and my cache of Apple stuff is in a very sad state.
I do have useless vintage things that I can't or don't wish to sell - random spare CPUs, for instance. But then again some of those duplicate sound cards - come on...
And I'm pretty sure modems are worthless. I mean, they're worthless to us and we are the target audience! An unfortunate aspect of the modern world.
There is a thing or three that I'm sad got away from me though. I had a Nashua disk pack once, I don't know what the hell my dad did to it and I never really had a chance to ransack his house to try finding it. They're getting quite expensive now. And I sort of look back wistfully at the system I left my mother when I moved away, which completely disappeared by the time I came back. But that was 2004, so, well, fait accompli.