This appears to be a very nice example of this vintage (2008) Fet Valve Ultra 550 amplifier.
It does have multiple regulated power supplies. It has separate regulated power supplies for each 12V tube heater, and for each tube plate and each small signal mosfet on the audio boards.
It does not have the regulated output transistor power supplies of current production Fet Valve amplifiers.
$1100 is a fair price assuming good cosmetics and electrical performance.
Seller please make sure the nut on the big power transformer hold down hardware is tight before shipping! It can work its way loose after years of use.
Frank Van Alstine