Mesa boogie walkabout scout 12 A local store has a used one of these for sale . It appears to be a 12" and physically looks in excellent condition. the head does not have the brown surrounding some of the controls and IIRC it is black background around the controls .Does this mean it is old??? What kind of maint , if any , needs to be done on this head IE tubes etc.. They are asking $800.00 , what would you expect to pay walking out the door with this amp ? I currently have a GK 700RBII and an Ampeg BXT 210 M cab. I like it but also like the apparent portability of the Mesa. Any comments good or bad requested and welcome.