Corsair RM750x PSU, this one is pretty nice but there's an issue with the plug connector. It has to be just right to power it. $50 -- I may try to fix it.
Dell 45W laptop power supply: $5
Seagate Exos x16 16GB SATA harddrives: I have 7 of these. They were recertified when I bought them. Since my ownership, very, very little use. $150 a piece.
Trendnet TEW-824DRU router/access point. Not sure if I have the power supply for it. Takes 12V, 2A, through a barrel connector. $15
I also may be able to throw together an older (15+ year old) Dell (single or dual) Xeon desktop with ECC memory (up to 32GB, if I recall correctly.) Could double as a space heater. T5400/T7400. Might have more than one.
Prices are negotiable, within reason. I priced things pretty quickly and am willing to consider comparables. I plan on testing anything requested if I haven't already tested it, especially HDDs/SSDs.
May be able to deliver to Moscow or CDA, especially for larger orders.