Couple of things for sure..
...
She's pure German, and is what the P220 was started around, 9mm.
The P220's are now only 45cal, and that gun is not made anymore, SO, from what I can see with those pics, she's looks in good shape, and the price may be good, but others will chime in that know much better. But as I said, that gun in 9mm is and was a great accurate platform shooter, along with, they're not made anymore, so, up the long years ahead, with whatever you do with her as far as sending her back to Sig to be completely refurbished, for something like 150 bucks, basically, you'll get back a new gun, *finish and all.
*IIRC
Could be a great shooter for ya, and in the long run, a good long term investment..
Let us know,
Ls