That is gorgeous. One of the top five most attractive morays, in my opinion.
(dragon, yellow goldentail, tesselata, snowflake are the others)
Honestly, I think you could get more than $100 for him. Think about it, he's fairly rare at LFSs. The problem is finding someone who can fit an adult in their tank. Not many can. But a qualified buyer would snatch him up quickly.
Good luck!