Sears offers the Racor Pro PLB-2R Gravity Bike Rack, model no. PLB-2R, for $45.41. (Amazon has it for the same price with free shipping, as does Walmart with in-store pickup.) Opt for in-store pickup to avoid the $22.57 shipping charge. That's $3 below the lowest total price we could find for a shipped rack. It holds two bikes and up to 100 lbs.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.