ams511
Contributor
As you say, he may be able to get as much as $75. But IMHO, if he really wants to learn about diving, learning how to service his own regulators is not a bad thing. That would save the service cost even if he has a to buy a few tools.
In his present budget, used gear and learning how to do his own service is not a bad way to go (again, just my opinion).
I agree that learning regulator service would be a useful skill for a scientific diver to know because they may be away from locations with dive shops. However, the parts kits for this regulator is probably $100 alone plus the cost of the specific tools for the Micra. I don't have Harlow's book with me but I think I remember him warning that the Micra is not the easiest second stage to service.