Some fees for licensing and getting there plate. And if you live in my state/county (WA, Clark county) you pay 8.4% or 8.5% excise tax even though the vehicle was bought out of state from a tax free state. Some dealers also charge their own bu##sh#t documentation fee and they may add on a transport (not delivery to you!) and setup fee.
When I bought mine, my friend was the sales guy, different dealership, and he said "Oops, I accidentally put 0 for setup costs, let's see what they say", so I got lucky.