Well quite often you wont get the best price out of a car or boat dealer that way.
For some reason they seem to want to tough it out.
And often they wont give you a better price till you have told them that you can do better else where... and by how much.
When we baught the car for the Mrs....it went back and forward half a dozen times... before we gave the deal to one bloke..............then two days later one of the others rang offering a still better price by $500 but he was too late........by the time it was over we ( the Mrs mostly) had wangled $5000 off arround $30 000 original offers.
cheers