Nitpicking: doc fees are set in stone at any particular dealership, according to what I've read on a handful of car buying sites. If they charge Buyer A $300 in doc fees, they have to charge EVERY customer the same amount by law. This varies state to state. Of course, how this affects the OTD price is all part of the negotiation and exactly why I only deal in OTD numbers. Like others here have said, how they get to that number doesn't interest me at all.