OMG, when we were in the Dominican Republic, we told them we were from Boston (because if you tell them "RI", they'll be like "where"?) and they got all excited. "Oh, you from BOSTON? Do you know BIG PAPI?" "Yeah he's my BFF" "Ohhh! You know Big Papi! Well, then you a brother of mine! Name your price, brother!"
And that is how to get good deals at the stalls. Tell them you know Papi, XD.