The typical Marlin 39A does not have a scope. They are drilled and tapped that one can be added.
See link below-
20-50 usd
No
About $30
You can't it is not designed to come apart. Time for a new Scope.
Send it back.
5-100 usd
Unfortunately, not a great deal. A few have recently sold on EBay for around 22 - 28 dollars, but weren't perfect. In perfect condition and with the rings could be around 40- 50
It's worth between $10 to $15 used.
I just paid $10 for a used one. Reg.No.F. 7432C
bout 700 bucks i would say
Priceless! ... actually around $450 depending on condition, but they were made by Tikka of Finland some as early as the 60's, they are quality firearms for the price