The RC stands for Regular Carbine
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.
Model variation
the cost 3030 cal 336sc
The R prefix to your serial number indicates that your Marlin model 336 rifle was produced between 1957-1958.
$350.00 to 500.00 depending on condition
Your Marlin model 336 RC(regular Carbine) will range in price from 250-350 dollars depending on overall condition,and a good bore.
Your Marlin model 336 was produced in 1976.
300-500 USD
Your Marlin model 336RC(regular Carbine) was made in the year 1966 with the 2 letter prefix of AB to your serial number.
Your marlin model 336 was produced in 1976.
You need to include a serial number to get a answer.