Prime-Line 250-Foot Roll Black Vinyl Screen Spline for $20 + free shipping w/ $35

The same one is over $30 on Amazon right now, and more again elsewhere. Choose in-store pickup to dodge the $5.99 shipping fee, or get free shipping with orders of $35 or more by signing up to MyLowe's Rewards. (It's free to join.)  Buy Now at Lowe's