way high. $75 mount and balance is insane,
IF you are bringing them the wheel and tire, and all they have to do is the swap.
If you are bringing in the bike, with wheel attached, then $75 is for a lot more labor, and actually reasonable.
Like I say, if you are bringing them a wheel (off the bike) and a tire to mount, and you end up paying anyone $75.00..........they will be laughing for years to come. I'd pay $20, and no more than $25.
As for quality, IMO they have the ability to handle waaaaaaaaay more than a vintage CB will
ever throw their way. I just don't see vintage CBs with riders dragging a knee at 100mph.