What are some FRESH FRUITS/VEGGIES that I can purchase at familiar stores (Wal-Mart, Fry's Marketplace, etc.)?

Im preparing for a diet and Id like to know a GREAT place to shop locally for FRESH dietary foods ESPECIALLY fruits and veggies and NOT blow up my budget. Im currently in North Phoenix (Arizona) so I can only think of local places like Food City, Bashas', and Fry's. Plus Im spending CASH. If you can give me some stores, items, maybe a financial tip for using cash on certain types of food (like whats worth the cost etc.) ONLY POSITIVE FEEDBACK. NO NONSENSE OR BS. Thanks!