like i said, the most important things are the case parts. fet clamps/clips are a big deal, but not impossible to replace, and holes in th board. other than that it's just time and ordering parts. on majority, an amp will take in the range of 15-50 in parts and 2-4 hours labor. some will be more or less than either, but that falls into good/bad luck, and if it's a beast, then things start to skyrocket. i've spent well over 10hours on one amp just mapping the schematic enough to completely isolate the area of the circuit. i've also done a few real simple repairs. the "if" factor mostly comes in with newer amps that like to get real proprietary, and deface part numbers and refuse to release sceamatics, no matter how old... but i don't really see any here that stand out for that.. you would need a great amount of investment to fix all of these, and sit on them until sold. i have more than this within 10' of me as we speak, and half of them will keep me busy over the whole winter. i would only suggest a couple, if any, to send in for repair. if you send me, and a couple guys a list of each amp, with pics, we can work on getting a relative value of each with notes.
