What are our guarantees that you can`t take it back? Everything is under your name, your card history you could simply report us or blackmail us if we go too big? How could we sign that through a contract? You could always do it anonymously?
Well, it comes with all the assets needed to run the business + all the secrets for its success. And I believe you can lock it with amazon to secure it.
Many amazon businesses are sold daily and I dont think I ever seen this as an issue.