Your marlin model 782 was made by marlin in 1980.You can find this by subtracting the first 2 digits from 100.Hence 100-20=80(1980).
Your serial number indicates that your Marlin model 782 was made in the year 1977.
To determine the age of a Marlin Model with a Micro Groove Barrel, you can reference the serial number, which typically indicates the year of manufacture. Marlin has specific serial number ranges that correspond to different production years. You can consult a Marlin serial number lookup chart or contact Marlin directly for precise dating based on the serial number. Remember that the model and type of firearm may influence the specific dating process.
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
11238344
Your serial number indicates that your model 782 rifle was made in the year 1981.
My Glenfield Model 25 has a micro-groove barrel,so I imagine others do as well.
$350-400 in PERFECT shape.
50-200
What is the value of a Marlin Micro Groove Barrel MCD 336 Cal 30-30 WIN?"
1987