I have a Super Champ Rivera era amp that the on off switch needs replacing. Sometimes it turns on sometimes I have to wiggle it just to get the amp on so it’s time to replace. Sooo... the question is for a $4 switch what would be a reasonable repair price or should I just discharge the caps and do it myself? I’m not a tech I’m a player but the last time I went in for an amp repair the bill was rather high albeit the guy did a good job. Don’t want to bore you with the details. I highly respect techs and will pay a reasonable price I just don’t know what that should be. I’m in the mid Atlantic region east coast.