For Prime members only, Amazon offers the Wenzel 3-Person Alpine Tent for $45.49. Clip the coupon on the product page to drop the price to $41.49. With free shipping, that's $15 off list and the lowest price we could find. This 3-pole pentadome tent features a removable fly, fiberglass frame, integrated mud mat, and two mesh windows.

Update: The price has increased slightly to $42.38 after coupon and is available with free shipping for all purchasers.