Last year I did a 3-week trip to New England in the USA. I found absolutely everything, from food, to electronics, clothes, cars, rentals... far cheaper than in Europe. I guess buying fresh tomatoes and vegetables could be more expensive than in Spain, but I didn't manage to see them on any supermarket.
Just a ridiculous example about American clothing brands that exceeds all limits: a pair of Calvin Klein jeans bought in Macy's NY (not sale, just the regular price), was about $45. Posh assh**** are paying 120€ (i.e. $180) for the same stuff in Madrid, and are happy with its exclusiviness!.