Macy's offers the O'Neill Men's Calypso Stripe 21" Boardshorts in Yellow for $17.73. Pad your order with a beauty item (they start at $4) to bag free shipping; otherwise, shipping adds $10.95. That's the lowest price we could find by $18. They're available in sizes 31 to 44.
PayPal Digital Gifts via eBay offers a $50 Express Gift Card bundled with a $10 Express Gift Card for $50. (The gift card will be emailed to your registered PayPal email address within 24 hours.) That's a $10 savings and the best price we could find.