[HunterST]

I really, really trust LAWW. This quote really sums it up for me. They are likely going to have to explain why it is $500, but this appears to be right on track...

Originally Posted by CTech

There might be a lot more work quoted in the $500 estimate than just reluming one hand.

If the hand with the damaged lume is still on the watch and the broken pieces of lume are somewhere in the case or movement then the estimate might be to disassemble the watch, remove the hands, clean the movement, dial, crystal, case, case back, etc. of old lume particles, relume the minute hand to match the hour hand, reassemble the watch, test operation, regulate, etc.

If that is the case then $500 sounds more reasonable than when the OP first posted the question and inferred that all was required was to relume one hand.