Ok, retrogaming w/ emulation (DOSBox, ScummVM, ...) is nice, but frankly speaking after 10+ years of MAME now I want more, I want new old hardware, I want my personal museum :-D
So I've started one....
Il mio ultimo acquisto su eBay (in Italiano)
My last purchase on eBay (in English)
Plans for the future: to recover my oooold 286 kept in my family's house garage, to buy/build a full featured 386 (DX), than a 486, than a Pentium, than a Pentium II. Then start with the consoles :-D

Do you have enough room???
I had a similar idea to this only I wanted to get whatever computers I could find in a scrapyard and make them do distributed computing stuff like SETI or Folding@Home (if they can handle that). That way, even old machines could find a use even today.

Do yourself a favour and get yourself a Neo Geo MVS cabinet (Neo Geo Max 330 Mega Pro-Gear Spec). Metal Slug! King of Fighters! And very little buck of each bang as there are still many of these cabinets around (I own one too).

Get a Game Gear, Lynx, and if you can ever find it one of the original Game Boys. Now those were some frickin' bricks right there! Those could qualify as defensive weaponry hehe.

now I will brag!
Original NES (including even the wireless adapters.. two of 'em!)
Original Gameboy
Gameboy Color
Gameboy Advance
(sold my DS)
FCtwin (plays supernes and nes games)
N64
Wii
Playstation (ye olde gray, and it still works)
Playstation 2
Xbox 360
aye, it is modest, but I'm excited to still have original hardware that works!
sure the FCtwin isn't original, but it still plays most games.

Pretty similar list for me, but I can add to that a working Sinclair ZX81

i have some pieces of old PC hardware (mainboard for 486 with integrated GPU, RAM, not using any bios, with SCSI) and propably functional didactic

If we're on old hardware, then I'm the proud owner of a 48k Spectrum, a C64 and a C128 as well as various hardware extensions for each of them.

Does my Altair 8800 count?

Somewhere in storage 300 km away, sits my C64/128D and Atari2600 (Wood finish still intact).
I had to throw out a couple of old PCs not long ago for space reasons, but there are plenty of spares around the place when I earn enough to expand my domain. There's a bunch of Sega consoles sitting about too someplace.

Nice buy mate.
I wish I had more room, I'd set up all my old machines, still got a gen 1 C64 about as well as my amiga & atari 2600. Sadly I've lost my oldest game, a giant brick with 2 sliders, a power button & a coax out that played a pong knockoff that was so unsophisticated it didn't even keep score.

Oh, just to report, the PC I was talking about in my post has turned to be broken, so I have been obliged to get another one from the net.
It's a pretty amusing experience, anyway, to see for the first time after tens of years a monochrome screen blinking things like "512 Kb of RAM", "Turbo Mode", "Nec V40" and so on... I'm looking forward to make this PC shine, up and running Prince of Persia the way I looked at when I was a boy :-)