Oh yes! I have several. I was actually planning to start a thread like this, but you beat me to it.
1. Compaq Presario 5360 - 1999 - AMD K6-2 450 MHz - 128 MB of RAM - 10 GB hard drive - Windows 2000. Was originally Dad's computer, purchased used for $300 in 2002. I got a hold of it in 2006 or so, and it was my only computer until 2010! It's based on the horrible SiS 530 chipset, which doesn't play nice with Windows XP or Linux. It's the most useless of all my old computers, and I'd like to see if I could get something for it on eBay. (It's in the "rocket ship" case, and apparently they are rather collectable.)
2. Generic 486 system - 1996 - AMD Am5x86 133 MHz - 64 MB of RAM - 1.2 GB hard drive - MS-DOS 6.22 + Windows 3.1. Got it from high school, was originally going to be thrown out. It's based on the infamous PC Chips M919 motherboard with the fake L2 cache. An excellent motherboard otherwise, though. I fitted it with an ATI Mach 64 PCI video card and a Creative Labs Sound Blaster AWE64 ISA sound card.
3. Epson Apex Plus - 1989 - Fujitsu 8088 5/10 MHz - 640 KB of RAM - 20 MB MFM hard drive. Belonged to my high school math teacher. Works fine, but has a problem where whenever you try to write data to the hard drive, the DOS gives a memory parity error, and the computer subsequently crashes. If I remove the hard drive and use the computer only with floppy disks, it works absolutely perfect. I replaced the original CGA video card with a VGA unit, and I'm wondering if that's not playing nice with the hard drive controller.
The following computers aren't really vintage, but certainly old enough to qualify to some degree.
4. Compaq Deskpro EN - 2000 - Intel Pentium III 1 GHz - 512 MB of RAM - 40 GB hard drive - Windows XP. Got it from high school. This computer actually serves a very important purpose; it's my only computer with FireWire connectivity, allowing me to import the video I film for my YouTube videos from the Digital 8 camcorders I use.
5. Apple iMac G3 - 2002 - PowerPC G3 600 MHz - 512 MB of RAM - 40 GB hard drive - Mac OS 9.2 + Mac OS 10.4. Got it from high school, mint in the box, with all the original equipment. It was kept in a special classroom, and was rarely, if ever, used. I don't use it, and I'd sell it, but whatever box I'd ship it in wouldn't be able to fit in the car!
6. Acer Travelmate 233LC - 2003 - Intel Celeron 2 GHz - 1 GB of RAM - 30 GB hard drive - Windows XP. Got it from a family friend. Don't use it, but it's a cool laptop since it has a floppy disk drive.
7. NEC MobilePro 900C - 2005. This is a Handheld PC, running Windows CE.net 4.1. Bought it on eBay for some $50, which is incredibly cheap for one of these. Unfortunately, it was too good to be true - the seller's pictures were so horrible, I didn't at all see that the entire unit was painted with a sticky, awful-looking grey paint. However, the computer works perfectly and the battery holds a great charge, and I knew I would never get another one for that price, so I let it go.
And a couple of weeks ago I picked up a Dell Optiplex GX150 (Intel Pentium III 1 GHz - 512 MB of RAM - 20 GB + 15 GB hard drives - Windows XP) for $15 at the thrift store, along with a monitor. I might turn it into a Linux machine. Then just a few days ago I picked up an HP Pavilion A720n (AMD Athlon XP 3200+ 2.2 GHz - 512 MB of RAM - 200 GB hard drive - Windows XP) for free from a friend. Not sure what I'll do with that one.
Trent