What is a value of a Feinwerkbau model 80 serial 216421 still in wooden case?

The value of a Feinwerkbau model 80, particularly one with the serial number 216421 and in its original wooden case, can vary significantly based on its condition, market demand, and any included accessories. Generally, these air rifles can range from $400 to over $1,000. Collectors and enthusiasts often seek models that are well-maintained, so factors like cosmetic condition and functionality will greatly influence the final price. For an accurate valuation, it may be beneficial to consult recent sales or listings for similar models.