Sears offers the Hanes Men's Long-Sleeve Plaid Flannel Pajamas in Blue for $9.99. Opt for in-store pickup to dodge the $5.75 shipping fee. That's $12 under the lowest shipped price we could find. They're available in sizes L and XXL only.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.