This amp first came to the market in 1965. When i listen to it , i realise that by 2015, that is four years from now, the design wll be fifty years and it still sounds fabulous. For the same reason, I do not mind paying good money for a vintage McIntosh or Marantz tube gear, but unfortunately, in our shores, these are as rare as hen's teeth. It would appear that after all these years, not much has changed/improved in terms of amplifier design and sound quality. Tubes certainly have some magic.