What is the age and value of a marlin model 36-A-DL-30-30 cal serial number D15765?

The Marlin Model 36-A-DL in .30-30 caliber was produced primarily between the late 1940s and early 1950s. Given the serial number D15765, it is likely from that production period, making it approximately 70 years old. The value can vary widely based on condition, originality, and market demand, generally ranging from $300 to over $1,000. For a precise appraisal, it's best to consult a firearms expert or a current market guide.