If you're currently buying pizza sauce in a jar, STOP! Here's a recipe that's less than 40 cents and will coat 1 large pizza. I found this in the archives of my computer and wish I could tell you the original source, so many thanks whoever you are.
Open a small (8oz) can of tomato sauce and add to it 1 t. each olive oil, oregano, and basil; 1/2 t. each salt and garlic powder; and finally 1/4 t. cayenne pepper (more if you like your sauce kicky). Mix this up right there in the can and let it sit while you make your dough or breadsticks or whatever it is you're making.
I buy small cans of tomato sauce for 25 cents so after spices and olive oil, you might spend 40 cents. The tomato sauce I buy has no sugar in it, but it does have salt so I usually omit the additional salt altogether.
Another great option -- double the recipe using a larger (15oz) can of tomato sauce. Either make 2 pizzas or just freeze the extra sauce making the next batch of pizza half done before you've even started.