Agree. Be prepared to walk away - also it is the end of the month so if you are able to sign today/tomorrow that might help as they will want to hit their sales targets for the month
Or if they have hit their sales targets, they won't be interested

Seriously though, over the last couple of months I went round countless garages, to ask about a trade in against various different new cars. More or less all of them wouldn't budge on either a discount or increasing the price of the trade in despite me telling them I was willing to do a deal there and then. Every garage I went to commented on how immaculate my car was and you could definitely see it was taken care of but they still wouldn't offer a better trade-in figure. I couldn't understand some of their attitudes, it was as if they weren't interested in selling a car.