Sig 239 .....( the Sig 220 is in .45 acp only ) its a different model...
http://sigsauer.com/CatalogProductDetails/p239.aspx
They come in different trigger configurations...different finishes...list price is $ 929 with nite sights....but in my area they're selling new for $ 750 - $ 825 or so .....and there are a lot of them out there used / in good shape as well.