Yep, twenty bucks was a good buy. I like the Meiacanthus blennies, they're visible, bold, and a departure from the lawnmower blennies that everyone keeps.
Not difficult fish to care for, and they feed on zooplankton normally. Frozen foods like mysis shrimp and Cyclopeeze are popular, but they'll eat lots of other types as well. I know someone who has their Meiacanthus eating Spectrum pellets. Any food you give them has to be pretty small because of their mouth size.