Flavorful, local lunches less than $10

I am forever on a quest to try as many cheap, great, local lunch places open on Saturdays and Sundays.

My rule is lunch for one person has to be less than $10. Any cuisine allowed. No national fast food chains! Some examples:

Master Taco: al pastor tacos
Roostar: bahn mi
Cali sandwich: bahn mi
Moon Tower Inn: BLT
Burger Bodega: single patty burger

What are your favorites or suggestions?