Here's a stick of 512 DDR from a Mac Mini. It's only going for $5, because it's marketed for macs. If I were to buy it, could I resell it for much more, catering to the PC users?
Ok, so long as it's the same type of memory, it is compatible on either PCs or Macs. I'm thinking that I could make a little money buying memory on eBay listed for Macs and reselling in the PC category...