I am still a newcomer, so please pardon my errors- The Model 21 was at, I believe, $5250, the Parker VHE 20 in the glass display case is priced at $4500. The buttstock was extended and a black Pachmyer "white line" vented recoil pad added, very fine job, but that is an alteration to the originality of the gun, so I had hoped Cabela's might lower the price, but that is not yet confinrmed.
I don't know anything about Model 21 skeet guns, I only mentioned it as I wondered why another expensive double would be out on the open rack for handling, while the Parker 20, at about $750 less, was enclosed in the glass case. I am sorry I failed to get the exact serial number, but perhaps if you contact Tim Bakker he can supply you with that information, and also confirm the situation regarding the buttstock extension and pad on the VHE 20.
I did not mean to cause confusion by mentioning the Model 21 12 gauge. My bad!!!