Vintage Grover tuners. $100.
These are vintage mid-century tuners with a high gear ratio, such as were found on the Harmony Batwing and other mandolins from the 1960s. If you happen to be restoring such an instrument and want some period-correct hardware, these could be just what you need. In good shape, working well, no missing teeth, etc. Tuners only, no bushings or screws. See more photos, or for more information. $100 plus shipping.