Between 225-350 dollars,depending on overall condition and a good bore.
Your serial number indicates that your Marlin model 30A was made in the year 1979.
All depends on condition, model, accessories,...etc.
Marlin
Model variation
30
$350.00 to 500.00 depending on condition
there is a marlin collectors site or gunbroker.com
The Marlin model 336 will sell for between 200-350 dollars,depending on overall condition.
By including the serial number in your question,we will be able to answer when your Marlin model 336 was produced.
With the serial number that you provided,your Marlin model 1893 rifle was made in the year 1899.
The Marlin 3030 model is a classic hunting rifle made in 1902. The value of this gun today can reach several thousand dollars.
the cost 3030 cal 336sc