Ebay offers ASICS Unisex GEL-Quantum 90 SD FO Sandal 1023A018 for $22.99 (reg $60) with free shipping.

Product Description:
The GEL-QUANTUM 90™ SD FO model blends the versatility of a warm-weather sandal with the comfort of our lifestyle sneaker offerings. Featuring nylon straps on the upper, this sandal is also complemented with a buckled fastener for improved stability. Featuring 90 degress of GEL® technology cushioning in the heel, this shoe incorporates the same tooling from our GEL-QUANTUM 90™ sneaker for improved comfort.