Newchic offers this 10-Foot Waterproof Adhesive Sealing Tape Roll in White for $6.10. Coupon code "Tape30" cuts it to $4.27. With free shipping, that's the lowest price we could find by a buck. It's made of PVC and measures 1.5" wide. Deal ends February 28.
Note: This item ships from China and may take up to four weeks to arrive.
Planning for retirement savings to last until you are 90 or older is a daunting job. Make these errors, and the task goes from "difficult" to "impossible."