Walmart offers the Ultimate Survival Technologies U-Dig-It Field Shovel for $7.60. (Amazon charges the same.) Opt for in-store pickup to dodge the $5.99 shipping fee. That's the lowest price we could find by $6. It converts to a pick, and features a serrated edge, a screw-on rubber handle, and a storage bag.

Update: The price has increased at Walmart; however, Amazon still offers it for $7.60 with free shipping for Prime members.