The Wife is in the market for a new car, but raised an interesting question this morning... How does one pay for a car?

I mean the physical act of getting money from my hands to the dealership's hands. Between government regulation, and bank "safegaurds" I can't get move enough money to buy it. 

1. No way to move that much cash by debit
2. Credit card companies block transactions of that size
3. Banks won't let me withdraw that much

So how does one get money from your account into the dealership's.