I bought it for $600 in 1979 to play Xanadu by Rush and Starship Trooper by Yes in my band and sold it this past summer for just under $1,600. It was a '78 DT-650. I bought my '73 Marshall half stack for $700 in 1977 and sold it this past summer for just under $4,000. Who knew back then that I was making wise investments? I strive to keep all my stuff mint and it pays off.