There were 32 responses. If the response lists a place, it means either that the person is a national of that place or that the person has been living at least 5 years in the listed place. If the answer clearly clues to the ethnicity of the respondent, then I include it as well.
FIRST PLACE 10 RESPONSES: Toilet paper (New Jersey) (NY5x) (Ivan) (UK2x) (Miami)
SECOND PLACE 5 RESPONSES: Coffee (NY2x) (Miami) (DC) (Italy)
Bread or chocolate (Jordan)
Toothpaste (Jordan)
Beer and condoms (US officer in Germany) (German)
Lightbulbs and Tampax (UK)
Milk (Switzerland) (LA) (NY)
Diet coke (Pennsylvania)
Internet access (World Citizen – the Keith Man)
Orange Juice (NY)
Wine (Italy)
Rice (NY – Hispanic)
Vegetable/fruit (Miami/Chinese) (NY)
Baby Food (Pennsylvania)
Tobacco (NY)
Several people said water but I discarded this as an answer because none of the respondents who mentioned it are located in places where water is not potable and they all listed other items as well.
