I've seen the barrels selling for around $25 in excellent condition.
100-300 USD
Depends on condition, and which version/ barrel. Anywhere from $100 to $500.
50-500 USD depending on specifics
1/10 IIRC
200-400 USD
$250-$500, depending on the EXACT model and condition.
$150-$250, depending on condition, barrel, sights, etc.
Assuming you mean a Ruger Mk II, depending on condition, barrel, finish, anywhere from $200-$400.
Probably about $300 - $400
100-400
50-290 or so
50-225