The serial #'s are close. I paid 500$ for my first Sig in the early 90's and have bought 2- 220's and 2- 239's since, each for exactly 500$ even. As mentioned a trip back to the factory custom shop for one or several of their packages like the short trigger/short reset/action enhancement/solid stainless guide rod etc will make a good gun great + a warranty. I had no problem (other than paying for them) getting 4 more mags from Sig. Nice find.