If this is legit,then its a very good deal. I have 2 spare GM OPTIS,ONE HAS about 5k miles on it and the other about 97k. For anyone that is figuring on keeping their LT1 for more than a couple years and dosent have an extra,,I would say its a great deal. If you buy it and find out its an imposter ,I am pretty sureI bought one as a spare, a spline drive opti. It looks like a new unit to me with no signs it was ever bolted to a engine. Has the same GM number in the side of the casting that my original opti has. Check out the pictures in that thread, that's just what it looks like.