There are so many gelato flavors! It's hard keeping myself from sampling all the flavors. I try to limit myself to 3 before picking one. My most recent favorite is something that sounded like "salty turtle." It was rich and caramel-y.
The regular menu of pizza and such looks SO good from the glances at the tables while I've waited in line. If I'm ever on Walnut Street, and this place is open, I have to stop by and get a gelato, no matter what the weather. Mercurio's gelato is always in season.
A small gelato could be around $3, medium around $5.
I think I've grown to expect to see a Mercurio's booth at a Yelp event (which is AWESOME).