$10. New they're $249. NATIONAL DETROIT brand DAQ 10,000 rpm air powered disc sander. Patent # no. 2794303.
Great for car body work. It's older but all intact except for round rubber that is held by bolt to hold sandpaper flat and cosmetic plastic cover on back end has chunk missing. See photos. Lever freely moves back and forth. If you're not too far I can bring it to you if you have a big compressor to try it out. New they're $249. Just Google that. See new yellow one in photos.
do NOT contact me with unsolicited services or offers