Lids takes up to 75% off a selection of NCAA, NFL, NBA, MLB, NHL, and other clearance caps, with prices starting at $5. (Select styles may have an even larger discount.) Shipping adds $4.99, but orders of $50 or more bag free shipping.

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A couple of best bets, each with $4.99 for shipping:
-- Hurley Men's Black Suits Flexfit Hat for $10 (low by $9)
-- New Era Men's Chicago White Sox Diamond Era 59Fifty Cap for $20 (pictured, low by $3)