I asked the seller a month ago about the source of these boards. Relevant parts of his response below: "I cannot be absolutely sure. These boards were surplus from a closed HP plant but I have sold many of these lately with minimal issues." The "I cannot be absolutely sure" was in response to the question as to whether these boards were certified/field-ready parts, "green" references (fresh from assembly/not tested) or possibly those boards which didn't quite meet spec during testing/burn in. This was a different batch than the ones currently up. Anyone buy/use one of these? Seems like a great deal if they've already been deemed worthy of the 3458 spec.