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8. San Marcos, Tex.

This city is located between Austin and San Antonio and is the college town of Texas State University—San Marcos. The cost of living is 86.3 percent of the national average.

San Marcos has the cheapest average prices for the following products:

Tuna: $0.74
Cascade Dishwashing Powder: $4.58
Doctor: $72.36
Pizza: $8.60
Toothpaste: $1.83