Still have my Sinclair Spectrum 48K in the loft. It has a curved dent in the keyboard overlay between the N & M keys where I used to roll a golfball to set sprint world records in Daley Thomson's Decathlon!
I would love to try and get it going again but I would have to find cabling & a cassette deck from somewhere.
I also have an Amiga 500 with a hard drive fitted and a few games on floppy disk. Managed to start it up recently but couldn't do anything with it as the mouse wouldn't work. I was worth it though just to hear that sound from the hard disk.
Also have the full range of consoles from PS1 to PS4, XBox to XBox One, and a Wii with one of those Wii fit boards. Just wish I could get my hands on a Series X though!