You can't beat Argyll Place for fruit and veg shops. Walking up this small street, it's impossible to ignore the profusion of colourful goods arrayed on the pavement, and I swear you won't find cheaper produce anywhere else in the city.
My favourite of these shops is Nadia's, although until recently I didn't even know its name - I just knew it as "the one nearest the top," or "the one that has the discount bucket." It's not especially different from the other two or three, but I like it because I got to know the staff a little here, who are always impeccably polite, and because they always have such a good range of decent quality produce, from basics such as onions and potatoes to more exotic seasonal offerings such as fresh figs or mangoes.
Like anywhere that sells loose produce, it's important to look over what you buy and pick out the best/ripest/firmest of whatever it is you're buying, but in general nothing here is in dodgy condition, and, if you live in the area, it's a great place to pick up ingredients for dinner on your way home. read more