What is the value of a singer featherweight model 221 serial number AF073730?

The value of a Singer Featherweight Model 221, particularly with the serial number AF073730, typically ranges from $300 to $600, depending on its condition, included accessories, and whether it has the original case. Well-maintained machines with all original parts and accessories can fetch higher prices among collectors. To get a more precise valuation, consider checking recent sales on platforms like eBay or consulting a specialized sewing machine dealer.