$350-400 in PERFECT shape.
250-375 dollars depending on overall condition of the rifle in question.
Your serial number indicates that your Marlin model 782 was made in the year 1977.
Your Marlin model 783 was made in the year 1971.
You will need to add the serial number,to get the answer to your question.
150$ to 250$ is my best guess
Your serial number indicates that your model 782 rifle was made in the year 1981.
Your serial number indicates the year 1987.
Check the barrel and receiver.
Check the receiver and barrel.
Check the frame and barrel.
MSRP new was $447.00. The serial tells that it was made in 1995 (first 2 #'s minus 100). You could get between 340-400 if it is in PERFECT shape.
1976