I have 2 sets of vintage 26" MTB tires for sale. One set are Farmer Johns Cousin dry rotted beyond riding but would make good use for a garage queen bike that needs proper tires to complete the bike. $60 for this set.
Second set are 2 Panaracer Smoke originals, not repops, and are fine for riding as they have 2 small rot spots each. These are supple otherwise and will look nice on a vintage MTB. $80 for the set.