That would be a tie, at $350:
S&W Sigma (VE), 9mm. Purchased in the midst of a gun-crazy nation. One stovepipe early on, zero FTFs, and I'm 1000 rounds in.
SIG P6 - one mag, no holster, but very little holster wear. Overall great condition and great shooting. Technically the cheaper one, since there was tax included on the other.