Two reasonable options:
1. Buy and install tires at Discount Tire/Costo/Sam's Club.
2. Buy tires from TireRack.com and install them at Wal-Mart.
You can check price online at TireRack/Discount Tire/Costo/Sam's Club.
I doubt you will get good tire price at Autozone.
My old Camry cost my around $300 for 4 BF-Goodrich tires at Sam's Club
including installation/balancing and tire disposal charge.