RE: What, No More Tool Kits?
As long as your ad didn't state there was a tool kit included then the buyer has no legal expectation of receiving one. Even if you were selling it "New In the Box" (NIB) you would be required to provide the tools only if the engine originally came with the tools. As you indicate that is not case, so there should be no expectation from the buyer that tools would be included with the engine.
Ken