Sears offers the Northwest Territory 9x6-foot Sport Shelter
in Red, model no. HPT002K, for $29.99
for shipping. Plus Shop Your Way Rewards members earn $10.30 in SYWR Points
. (Not a SYWR member? It's free to sign up
.) Assuming you'll use the points, that's $20 off list and the lowest total price we could find. It features a fiberglass frame, silver coating top fabric, and breathable mesh.
Of note, Shop Your Way Rewards members may be eligible for additional credits and discounts.