Restaurant chains are competing to offer cheaper meals. From Taco Bell to Starbucks, here are the best deals.

• Taco Bell is the latest chain to offer a new lower-price combo deal.
• Other fast-food chains like Burger King and McDonald's are also involved in the value wars.
• Chains are trying to lure diners back in after high fast-food prices have turned many away.

The fast food wars are heating up.

Last week, Taco Bell became the latest chain to announce that it's launching a new $7 value meal deal.