I go with them to whichever close market or restaurant and buy them what they really need, I don't usually put a money limit but rarely goes over 20 bucks with a nice food basket.
Part of these process is also listening to their stories, sometimes you can even hire them for some tasks and I usually tell them to help others in the same way if they have the oportunity (or to teach their children this lesson).
Of course they could sell these items later but I really feel good about this and I don't think they do that.