I remember that 20-2; I thought all along that Lyle Larkworthy had grabbed it. As I remember, it went quite cheaply. It was surprising that the backstrap number wasn't mentioned in the description but the serial number fit right in the ones shipped to Austin PD.
Regarding the description of the 27-2, could the mention of the 'pins missing' be indicative of them being so flush and blued that they are invisible?