One of those who bought one of these barrels through me is selling it. His was one that wasn't serial-numbered to a particular P99. If anyone is interested in one of these barrels, now is a good time to take advantage of this price.
Permit me to add that the Bar-Sto .357SIG barrels for the .40cal P99s are very accurate. Significantly more accurate than the stock 40auto barrels in my experience. Remember these are match barrels. Mine was fitted to my slide and is accurate beyond my expectations. I have not done a formal, measured test on it.
I was so pleased that I ordered a group purchase Bar-Sto 9MM barrel for my 40auto Sig P239. It will be a three caliber pistol. (See the Sig Forum)