If it´s a 73 it´s a vintage bike. After 73 they started boostin suspenshion way up. The bike is worth a about 1.5K. Take money off if things aren´t running right of course. Make sure it´s a 73 first. The dt1,2,3 look a lot alike. If it´s a dt1 (1973) the speedomoter and tachomoter will be round. Good luck on sellin that.