i am trying to buy a new boat. The third party lender (seadream) is requiring that the dealer provide a manufacturer invoice. The dealer says that its crazy they ask for that, that boat dealers never show invoices. They refuse to give it to them. The difference to me is 4.99% on my interest rate. Is it common to ask for invoice? Seadream says it is, dealer says its not. Please help with this, i want to make a decision tomorrow.