Groupon offers the Reach Barrier Do It Yourself Garage Door Insulation Kit, model no. 3009, for $32.99. Coupon code "SALE3" cuts it to $29.69. With free shipping, that's $2 under our mention from last July and the lowest total price we could find by $15. It covers an 8x8-foot garage door and purports to insulate and reduce noise. Deal ends May 19.