Partly inspired by threads like this, I have written the following message on discs I consider to be irreplaceable..."Reward if found AND returned."
FWIW, my name, PDGA # and Phone # have been there for a while.
I have lost 2 of them with the reward message and received a call on one from a kid that sounded like he was 10 or 11 years old. I immediately offered him $10 or 2 new discs...his choice.
He said that he would be back at the park in the next week or 2. Even though I don't live anywhere near that course, I offered to meet him there. Long story short, still don't have my trusty valk after several calls and texts in an attempt to give this punk more than what he probably should get in this situation.