318 differences ??

She's selling an engine, not rebuilding it. :D

Rani can give the buyer an idea what he might be in for, and she can sell him whatever he wants after the fact.

Giving him a heads up on what it might involve is a good thing, but unless you are also installing it for him all the details are his problem.
Just be helpful, professional and there with parts to sell if he needs them. :D