Here is a 65 K Coupe listed on Bring a Trailer with no reserve.
https://bringatrailer.com/listing/1965-ford-mustang-131/
This 1965 Ford Mustang is a K-code coupe built at Ford’s San Jose, California, facility in March 1965 and is said to have spent time in California and Ohio before being acquired by the seller in 2018. A refurbishment performed during prior ownership reportedly includes a repaint in the factory Ivy Green as well as a rebuild of the powertrain. Power comes from a numbers-matching 289ci V8 equipped with a hi-rise aluminum intake manifold and Holley carburetor and paired with a four-speed manual transmission. Additional equipment includes a dual exhaust system, reproduction Rally-Pac gauges, and 14″ styled steel wheels with dual-redline tires. Recent maintenance included replacement of the rear main seal and a valve adjustment. This K-code Mustang is now offered at no reserve with service records from current ownership and transferable New York registration in the seller’s name.