I have a few desktop machines that are Quad core 2.4ghz with 8GB of RAM and a FirePro V5800 video card. Also, 250GB hard drive and a DVDRW. They boot up fine, but the drives have been wiped. They have Windows Vista COA stickers, but you will want to install something else (I’m sure!).
Older machines, but great if you need a lot of RAM.
If you are interested, let me know. I’ll sell them to you in return for a donation to the MakeSpace. (You decide how much). I have about 4 or 5. If there is a project at the space that needs them, you are welcome to them. Or if you have a good story about needing them for a good cause.