I agree. Fleabay is probably the widest platform in terms of audience and specific items you can have.

I’m no mod or anything, but with the post count so low I, as a mere reader, would not mind seeing HA items for sale here as long as it’s hobbyists and not businesses.

You’d almost certainly want to employ some of the posting rules used in the r/XXXXsales subs. Things like prepend your title with For Sale, location and item description. It would also make some sense to declare in your ad some guidelines to ensure a smooth sale like PP invoice and/or some verifiable reference to your credibility (ie - Heatware/ebay ratings). There naturally needs to be some sort of assurances on both sides of the transaction.

I very much miss the r/homelabsales sub, but I am never going back.

What can I run on a Transmeta Crusoe?

Drive a screw into it. This is far easier to do with a carpeted floor since the screw head (and hole) is not as noticeable. Be aware not to have any screw heads sticking up anywhere when done. They do also make special screws that will snap the head off once sunk. Thus leaving no major visible trace, but you could use normal screws as long as you got them flush.

Try sinking the screw down on or near a squeaky spot in an attempt to tighten it up. You’ll need that screw to hit a floor joist as well to have something for the floor surface to tighten to. Sink one screw and test. If it didn’t help, back it out and try elsewhere nearby. It helps if you can identify the joist pattern for your floor.

You could also try from below the floor assuming access was available. But in that case, I’d also use caulk/glue from there too to help quite things down.

I would not do anything from above for a finished wood floor. Too easy to mess it up and your landlord would charge you for the damage. It is potentially do-able with finish nails, skill and careful precision (which I lack).