MATCHED PAIR Intel® Xeon® X5675(12M Cache, 3.06 GHz, 6.40 GT/s Intel® QPI) SLBYL 675901057790 | eBay
Not quite as good as the last one, but they have 8 remaining. I offered $100, they countered $110, $3 shipping.
I got them in yesterday and they work great. Decent upgrade for older platforms.