I feel like there would be way too many downsides to using the Death+Note at all. Here's all I can remember from the anime's initial list of consequences:
User is fated to go to limbo, neither Heaven or hell.
User gets to deal with a Shinigami, who may as well be a (semi)permanent roommate.
User ends up dying at the hand of this shinigami "friend" (Questionably true).
This being said, I'd sell the thing anonymously, so that if someone obtained it, then they could not with their knowledge, kill me to regain their money either. Money-Yes, Problem-Not really.