You needn't worry about that. I have my quad collection complete, at least what I want of it, I do very little bidding on Ebay anymore. By the way, when you get your GX280DSS right, you will be very pleased with it. It is very much worth the trouble. The glass ferrite heads wear very little, assuring that GX280DSS machines sound very good still, once other problems are ferreted out. Also the control board problems resulted in a lot of these machines being put into closets, because without knowing the secret to fixing it, the problem would just reoccur. Many folks didn't have the heart to just throw out such a fine machine, so a lot of them still exist with very little wear and tear on them. you will get much enjoyment from your machine.
The Quadfather