[*]1. [/*] SuperMicro X7DBE.  Dual Xeon 5000 series, socket LGA771.
http://www.supermicro.com/products/moth … /X7DBE.cfm

[*]2.  [/*]2x SuperMicro X7SBi-LN4.  Uniprocessor Xeon 3000 series or Core 2 dual, socket LGA775
http://www.supermicro.com/products/moth … Bi-LN4.cfm

[*]3. [/*] SuperMicro X7SBL-LN1.  Uniprocessor Xeon 3000 series or Core 2 dual, socket LGA775
http://www.supermicro.com/products/moth … BL-LN1.cfm

I'd like to get rid of all 4 pieces, so I'm pricing the whole package at $20 + shipping, which will probably be around $25-30, depending on your location.  The boards will not fit in a medium or large flat rate box, hence the higher cost.

If you live in the San Francisco Bay Area, you can pick them up and save on the shipping.