Crocs offers its Crocs Men's Swiftwater Sandals in Brown or Black for $34.99. Checkout with PayPal and apply coupon code "PSUMMER20" to cut that to $27.99. With free shipping, that's the lowest price we could find by $12, although we saw them for $2 less last September. They're available in sizes 7 to 15. Deal ends June 20.
Note: Coupon can be used once per PayPal account within a single transaction.