That's a $5 spread you see right there (including the happy hour beer).
El Rayo Taqueria has $1 oysters on Mondays, and today they had the Shuck Truck serving Cabin Cove Oysters from the Damariscotta River.
Oysters were briny, served with a salt-cutting red wine migonette. Sold out fast, but the Shuck Truck will be back. And hopefully we'll be seeing all manner of food trucks all over Portland soon anyway.