is there any benchmarks pitting these old xeons vs the new stuff(anything from the last 2 or 3 gens of cpu)? hard to tell anything without actually benchmarks.X5570 (4C/8T) 2.93 Ghz base with 3.33Ghz turbo is going for $22 shipped in ebay "Buy it now" auctions.
Not a bad deal when we consider i5-750 (4C/4T) 2.66 Ghz base with 3.2 Ghz turbo goes for $43 shipped.
Of course, those are 45nm chips.
I'm still price researching the 32nm quad cores listed in Intel Ark: