I have four CPUs, selling two pairs. I won't break them up so it's either a pair or two pairs. These are Intel Engineering Sample CPUs same as the Xeon W5580 except they are 3.0 ghz clock speed. $500 per pair, shipped anywhere. STEP: QGXP Quad-core with hyperthreadding. Server CPUs. You **may** also be able to put them individually into a desktop motherboard if your mobo supports the CPU, please check first as I have no idea about compatibility outside server hardware.