I have a mid 2000s hp proliant tower w/ scsi drives, a Dell power edge r710, Dell power edge r300, Dell power edge 2900, Dell power edge sc1435, a 2u super micro that was an early datto appliance, and an intro is 1u server, plus 2 48 port switches and a pile of electric cords/conduit for cubicals.

The hp server has scsi drives, all the other servers have wd enterprise sata drives.

Other then some missing drives the servers are intact (and even mostly functional) but I've seen old servers languish unsold forever so was thinking of scrapping them.

Any ideas if it's worth it from this forums expertise?

I also have a few disassembled hard drives and some really old RAM and CPUs in my house.

Scrap is always lowest value for an item. If there are working parts you can try to re-sell. You are correct that older equipment like this may not sell fast and that is up tp you to decide how long to offer it up. You also have the hassle of packaging and shipping.

That old Proliant might have Pentimum III slot processors in it. If it were me I would strip and scrap, then sell the sheet metal to a local yard.