I really want an Amiga A1200 or A4000, but can't justify the cost at the moment.
As for old hardware that I currently have:
-That crappy AMD K6-2 350 box my father built for me over a decade ago. He just HAD to use a PC-Chips M598 mobo (WORST. LAYOUT. EVER.) in an AT case, with an AT PSU. Oh, and no AGP slot, either-the interface is apparently taken up by the SiS 530 integrated graphics that make Intel's GMA chips look good. (It even loses hardware acceleration if you install a version of DirectX newer than 7.0!)
-A Pentium II 233 MHz box I picked up at a thrift store for dirt cheap, based on some Intel 440LX board with an AGP slot and in an ATX case. Slower and less capable than I was expecting, but there might still be a use for this thing.
(Also of note: it had one of those Quantum Bigfoot drives installed. You know, when hard drives apparently used to take up a 5.25" bay for a whopping 4 or 10 GB? Now we get more storage than that in a chip smaller than a postage stamp!)
-An Abit BP6 board loaded with dual Celeron 533s topped with Thermaltake Golden Orbs and maxed out with 768 MB of SDRAM, acquired from eBay. Not sure why I got this-maybe it was just for the novelty of having a dual-CPU machine for once. I'm still trying to find a purpose for it that'll leverage the dual CPUs and all that RAM. (Probably a server or pfSense router for all I know.)
-My old PC parts bin includes an STB-built 3dfx Voodoo2 12 MB, a Creative Sound Blaster AWE64 Gold ISA, a Creative Sound Blaster Live! Value, a Trident 2 MB VGA PCI card (no good for anything but basic 2D on a single monitor, and whoever had that Pentium II box apparently couldn't afford a decent AGP card!), and...well, I think that's pretty much it for the really old stuff.
-For something more recent, there was this Asus A7N8X-E Deluxe with an AMD Athlon XP 3200+ loaded in it and with a stock HSF on top, given to me totally free of charge two years and two months ago on the grounds that it didn't work. It was only a few months back that I managed to get the needed remaining parts (RAM, case, PSU) on the cheap; I ended up upgrading my flagship system's case, so the old one was a hand-me-down. Then I got an ATI Radeon 9800 Pro 128 MB and three 512 MB sticks of Kingston Value DDR-333 for US$12 shipped, which also allowed for Finally, I found an Antec True430 locally for US$5. Thus, the moment of truth came as to whether or not the motherboard was bad this whole time. Turns out the ONLY problem was a dead CR2032. No, really-replace that to cure the constant CMOS resets, and it's good! But it turned out that I just had to make one last little tweak...you see, I found this eVGA GeForce 6800 Ultra locally for US$30 thanks to its huge dual-slot HSF and just HAD to take that monster home!
-For input devices, there's my two IBM Model Ms (well, one's pure IBM 1391401, the other's IBM/Lexmark with a detachable cable and single-piece keycaps). Also of note is my Spacetec SpaceOrb 360-an old serial device that succeeded the Spaceball Avenger and is a favorite among Descent fans due to the 6DoF element of the titular orb. You manipulate the orb exactly how you want to move in game, and also noteworthy was that there was a Descent II patch made for the Orb that removed limits on turning speed! I also used to have a Suncom SFS Throttle and a Thrustmaster F-22 Pro, but have since sold them.
As for old hardware I want to have but don't, A1200 aside, there's the AMD-based Gravis Ultrasound cards, the Roland CM-32 (like an MT-32 with less external features, but with an expanded soundfont), the Aureal SQ2500 (I want to know what the big deal about A3D 2.0 is!), and finally, the Forte VFX-1 helmet, which I actually did use many years ago in a cybercafe to play Quake 1. (Only if I did get one, I'd use it with one of the old PCs to make a dedicated MechWarrior 2 setup and pretend it's a neurohelmet. NOSTALGIA TO THE MAX!)