I always get mine at the Blue Moon stand in either the 14th St. or GAP greenmarkets (Wed/Sat respectively, if memory serves). The website (http://bluemoonfish.com/fish/)says they're back now and should have ersters.
Dimartino wholesale seafood on douglas street Between 3rd & 4th ave you need to go before 11:00 am mon - fri to be sure, also do not waste their time for 1 dozen oysters . they will have a least 3 types also frozen blocks ( 4lbs) of domestic shrimp are a great deal good luck gt
So - what's a 4 lb. block of frozen shrimp cost you at DiMartino? I am definitely going to check this place out, but is there any way to get a good sense of what you migth be spending beforehand for shrimp, lobster, oysters, scallops, etc.?