e Ask a gunsmith for help
Colt did not make the rifle. Sauer made it for them.
Contact Sauer.
Price, the 92 costs more
You will have to call Sig Sauer to find out
I don't know how much exactly but a lot. The fact that it is from Sauer (now part of Sig-Sauer) and that it is a fine and now discontinued sport rifle will make it VERY valuable. Unless of course it is in absolutely terrible condition.
.22 Long Rifle - the Sig Mosquito
Try e-gunparts.com
10-100 USD or so
Try want ads, gun shows, gun shops.
No published sn data
100-500 USD or more depending on specifics
If you follow all the federal laws and have the money, yes.