Walmart offers the Duck Brand HD Clear 1.88" Packaging Tape 54.6-Yard Roll 4-Pack for $6.48. (Amazon offers it for the same price for Prime members.) Opt for in-store pickup to avoid the $4.97 shipping charge. That's the lowest price we could find by $7. (For further comparison, we saw a 6-pack for $11 last November.) This UV-resistant tape meets postal regulations.