RX400h, You make a valid point, but there are certain Used parts that shouldn't be used, like High Wear items such as internal engine parts, bearings, brake pads and rotors, clutch parts, water pumps, hoses other high wear items with a predictable lifespan. High dollar used items like engines, transmissions and rear ends and other used parts will always have a market because of the cost of the New Part. Many Used parts sold and installed, last quite a long time, saving their owners $$$ and keeping vehicles out of salvage yards. In my case, I don't believe the Liftgate motor is a "High Wear" item, and for me it was worth taking the risk on a used part. I'm mechanically handy, I could change the part myself if bad and not have to pay somebody else to do it.
PS, a Spotweld broke on the original Actuator Assy, and I didn't see it until after I installed the used one. The headliner has to be pulled down to replace, so I wanted to have a replacement ready to put back in and put the headliner back. As Always- Buyer Beware