You just need to give the impression that you are on the verge of forking out a real thick wedge,and have decided that the next boat you ride on will be the one you def will buy.
Ps try the rodman.
<hr width=100% size=1>Two boats please one here n one in the Med
Shorts, hawian shirt, flip flops and knotted hankie on head, with rolled ciggie butt hanging from corner of mouth, aim straight for salesman and say 'Oi! How much for this one, and I want your best price, not list price, and I want to drive it now'
If you turn up all dressed up they'll ignore you, cause that's what everyone else tries. They'll wonder if you're an eccentric millionaire, so will take you seriously.