X5690 Matched Pair Apple Mac Pro 5.1 3.46GHz 12 Core CPU Intel Xeon 2010 2012 US | eBay
Apple Mac Pro A1289 MacPro5,1 (Mid 2010/Nehalem) Quad Core Intel Xeon W3530 @ 2.8GHz / 6GB DDR 1066MHz SDRAM / 500GB Seagate ST500DM002 HDD / OS X Mountain Lion / ATI Radeon HD 5770
Intel BX80614X5675 Xeon X5675 Six Core 3.06GHz... at MacSales.com
Apple Mac Pro Mid 2010 2 x 2.4GHz Quad-Core Intel Xeon (MC561LL/A) – UNICOM, Inc.
The Intel Xeon 5670: Six Improved Cores
X5680 Matched Pair Apple Mac Pro 5.1 3.33GHz 12 Core CPU Intel Xeon 2010 2012 US | eBay
Intel Xeon Quad Core Mac Pro 2010 2.8 ghz CPU Processor | eBay
Intel Xeon 7500 ("Nehalem EX") Processor Ray Tracing Performance with Luxion Keyshot | Intel - YouTube
Mac Pro 12-Core: Two 2.66GHz Intel Xeon 16GB 1TB Super Drive Intel Xeon 2010 - Refurbished
I found a pile of old xeon, two of them being pga instead of lga, pretty fun ! They all date from before 2010, the strongest ones being 4c8t : r/ intel