Up for your consideration I have this vintage trek 930 single track mountain bike. It measures 19½" from the top of the seatpost tube to the center of the cranks. The top tube is 21¼" from center to center with the tape measure running along the toptube. It's in nice condition considering it's age. It has some scratches and so on but still looks nice. Everything is in working condition but it might need a tune up since it has not been used in a while.  I would say the tires are still good but it's up to the buyer if he/she wants to replace them. The wheels spin straight. see the pictures for the exact condition Thanks for looking.