I have an "old games" PC that sits here generally unused. Occasionally I turn it on (or not, as happened the last time when the power supply died).

It's a P-III 350MHz, runs DOS and Windows 98, has two SCSI DVD drives, a functional 5 1/4" floppy drive, ISA Sound Blaster Gold 64 sound card, an ancient ISA-based MIDI card with a fully functional Roland MT-32 attached, one of the original ATI All-In-Wonder video cards (one that still has a DOS video mode-aware BIOS) with TV tuner... and it's even on the network.

With the Roland it's great for ancient Lucasarts and Sierra adventure games. Also hooked up to my main 24" LCD, which is quite "interesting" for all those 320x200 resolution games.

I keep meaning to use it to try and archive all my old floppy disks.