Got a bunch of forgotten pennies in your car? Put them to use on National Lucky Penny Day (May 23). Taco Cabana is offering bean & cheese tacos for 1 cent. That's like over 99% off. 

The taco chain says guests can get one $.01 taco per visit, per transaction, so you won't be able to get 100 tacos for $1 (sadly). The deal is only valid on May 23. 

Hint: Two of those tacos make a filling and cheap lunch, as I learned in college — use the salsa bar to load it up with onions, cilantro and salsa.

Find a location near you here. 

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