Bestbuy offers Gaiam - SPRI 12mm Pro Fitness Mat - Gray for $10.99 (orig. $23.99) with free store pickup or $6.49 shipping.  My Best Buy Members get free shipping (join free).

Product Description:
Get the ultimate comfort and support during any exercise with the SPRI 12mm thick Pro Mat. With non-slip ridges for superior traction, you will stay put during ab work, toning, stretching, and more. Easily roll up this mat for compact storage and or use the included carrying strap to take it with you to your next workout.