Staples offers the Scotch Magic Tape 20-Roll Pack
, model no. 810K20, for $18.63
. Plus, Staples Rewards members bag free shipping
. (Not a member? It's free to sign up
.) That's $0.93/roll and the lowest total price we could find by $6. Each roll of tape measures 3/4" wide x 27.7 yards long.