JCPenney cut prices on several Arizona Men's Flip-Flops to $7 each. With free site-to-store pickup via coupon code "JCPSHIP", they're each at the lowest total price we could find. (Shipping is available, but adds $8.) Sales tax is added where applicable. In all, 12 styles are available.
A best bet are these Arizona Men's Scuba Sport Flip-Flops in Black for $7. With free in-store pickup via the above code, they're among the least expensive Arizona flop-flops we've seen. The come in sizes S to XL.