Amazon offers the ExOfficio Men's Give-N-Go Boxer Briefs in eight colors (White pictured) from $13.97. Better yet, add two to your cart and check out for a final price of $20.68. Plus, Prime members receive free shipping. (Non-members can spend $49 to qualify for free shipping; otherwise, shipping costs $6.17.) At $10.34 per pair, that's $10 under the lowest total price we could find for this quantity elsewhere and the best per-unit price we've seen. (For further comparison, we saw one pair for $14 in August.) They're available in sizes S to XXL, with prices varying by color and size.