Walmart offers the Duck 0.94" x 30-Yard Masking Tape in several colors (Black pictured) for $4.96. Opt for in-store pickup to dodge the $5.99 shipping fee. (Amazon charges the same with free Prime shipping.) That's the lowest price we could find by $2. It has a medium-high adhesion.

Update: Prices now start from $4.43 at Amazon with free shipping for Prime members.