i do have my old computer. a TI99/4A with Speech Synthesizer. i also have my old IBM PS/2 model 30. And I found an old Apple //e on the curb and it worked perfectly. Since then, i also got an Apple ][+ and a //c for portable gaming entertainment (wolfenstein, spy hunter, taipan, choplifter, lode runner, etc.). The old Apple 2s have rca video out, so you can just plug them into any tv. Beats the heck out of emulators.
i did recycle the first PC i built myself, which was a 486DX i build from a friend's old motherboard and various scavanged (free) components. the only reason I got rid of it was because i couldn't get it working. i kept the pieces that did work tho. i don't really miss it, since it was free (and pretty junky), it's only nostalgic because i built it.