Because these are older parts, you will rarely find them "new-in-box" at traditional retailers. Instead, look to specialized enterprise hardware vendors or marketplace sites:

This 22-core, 44-thread monster is ideal for heavy multi-threaded tasks like rendering or running dozens of virtual machines. It features a 55MB Smart Cache and supports quad-channel DDR4 memory.

~$8.99 at Atlanta Servers or ~$7.99 (Refurbished) at Server Superstore . Where to Buy & What to Watch For

Buying an Intel Xeon E5 Go to product viewer dialog for this item.

Remember that E5 v3/v4 chips require an X99 or C612 chipset motherboard (LGA 2011-3 socket). Check the stepping (SR#) if you are building a dual-socket system to ensure the CPUs match perfectly.