Just wanted some input.

This guy on Craigslist is putting up a sort of new Egnater Tweaker Tube head for $100. Only problem is that he says the power keeps going out. Is this an easily fixable thing, or will fixing it cost as much as the head itself?

Here's a link to the post : http://lasvegas.craigslist.org/msg/3758494696.html
Current/Main Gear
'06 MIA Fender Stratocaster
'97 Epiphone Les Paul Standard Lim. Ed.
'90s Peavey Classic 30
H&K Tubemeister 18
MXR 404 CAE Crybaby
Ibanez TS9
Ernie Ball Jr. Volume
Digitech Hardwire DL-8
TC Electronic Nova Repeater
Find out if it's just new power tubes or preamp tubes or both. Worth a shot in the dark.
Gibson Les Paul Studio
Highway One Telecaster
Dean Evo
Mesa F-50
Laney GH50L
Vox AC30 C2
Ampeg V2