Trade value higher?? That's simple to explain. Most people put an add on here thinking they can find a sucker to pay more than it's worth. I gotta say I have done that before. I paid way more for a motor (it came in my old Rabbit truck) than I should have. The motor was a pos and only made two passes and broke a rocker arm stud. After that I kinda got nervous about the rest of the motor so I tore it apart. I would have been better off buying the truck "turn key minus the motor" lol . I don't blame the seller. It was my stupidity for not knowing better. I actually sold him back the rods and pistons ( i think the crank too, but don't remember) and the NOS kit off the motor. I lost a bunch of $, but I learned a good lesson.