Bare has a rental car assignment at PHL. For that one, you rent a car online, and then go and pick it up. You are not allowed to drive around in the car. Once you return the car (after presumably driving around the block, I guess), you reveal yourself and take 19 photos. The fee is $85, which might be reasonable. No mention is made of the car rental fee, however. The estimated time onsite is 30 minutes.
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008