I purchased this a few years ago to build an energy-efficient PC but didn't end up using it. It is brand new and ready for use.
It is compatible with the famed LGA775 socket processors such as the Core 2 Extreme, Core 2 Quad, and Core 2 Duo. A complete list of these processors can be found here: https://en.wikipedia.org/wiki/List_of_Intel_Core_2_microprocessors
You can find info for this mobo on the Asus page: https://www.asus.com/Motherboards/P5Q_SE_PLUS/
NOTE: I will delete any email asking if this item is still available. If this ad is still posted, you can assume that the item is still for sale.