Dissapore is an italian gourmet restaurant guide, published daily. It's not available in english. http://www.dissapore.com/locali/fire...ini-del-mondo/. According to Dissapore, "Florence is the panino capital of world." They say that no other city has mastered the art of combining bread, salume, and cheese like Florence. You can use Google translate, but their list of the best in Florence is:

I Due Fratellini
Pollini
Samel Street Food
All'antico Vinaio
Da Nerbone (inside Mercato Centrale)
Ino

The article indicates that a typical panino costs about 3 euros, so a sandwich and a glass of wine is an inexpensive lunch.

Speaking of sandwiches, it's worth knowing the difference between panino and panini, because in the USA you often hear, "I'll have a panini." Many italian nouns end in an o. To change a noun ending with o (panino) to the pleural form the o is changed to the letter i (panini).

You can ask for a panino, or two panini, but saying "I'll have a panini" is like saying, "I'll have a sandwiches." It makes the server think, "do they want one, or two?"

The article also mentions lampredotto. Although it is the last of the four parts of a cow's stomach, it is called lampredotto because that part of the cow's stomach actually looks like a lamprey eel, a type of eel that lives in the Arno River. Because of that similarity, Florentines attached the name lampredotto to it. It's not translatable into an english word.