Walmart offers the Fruit of the Loom Men's Dual Defense EverSoft Elastic Bottom Sweatpants in several colors (Black pictured) for $7.29. Opt for in-store pickup to avoid the $5.99 shipping charge. That's the best price we could find by $10. They're available in select sizes from S to XL.
Note: Some sizes are available for $6.22 in-store only.
You probably don't need a year's supply of toilet paper to survive an outbreak, but consider stocking up on these items.