Okay, so this summer I finally had enough money to buy the amp of my dreams the Ampeg SVT-CL along with an Ampeg 4x10HE cab. I bought them both off of the Guitar Center website and had them shipped to the nearest store. The head was used and the cab was brand new. My only worry was that the head was somewhere around $800 which was shocking considering that they usually sell for much more than that. The description on the site mentioned that it was used and had a few cosmetic issues, but mentioned no technical problems. I've been playing it since this summer and from what I can tell it sounds all good, but I'm a tube noob and pretty naive. So things to look for that could be wrong with it that aren't glaringly obvious to me and just any ideas on what could cause this drastically lowered price would be thoroughly appreciated.