I'm looking to buy my first sig. I found a local shop with a Certified Pre-Owned Sig 228. It's very difficult to tell it from a new pistol...virtually no wear! It comes with the factory case, manual, 1yr warrantee, 2 mags, etc. It is equipped with night sights. What is a fair price for the above? They are asking $560, which will put it to $605 after tax. Thanks!