It certainly is a small ring receiver, year of manufacture should be stamped on it (last 2 digits), towards the front of the left side if I remember correctly.Looks like the butterknife bolt handle.
No idea on prices in the US. Not a bad start to a custom, for sure! For myself, I'd want to change the trigger, safety (winchester style), and bolt handle. Bottom metal is less of an issue for a hunting rifle, for me.
Pat
