Try and push them a bit more or ask if you can take off any of the extras you had on the bike that are still good . Because i reckon they book price the bike no mater what extras are fitted.You can then fit them to your new bike or sell them to get a bit more cash. I did this once with a top cd player i had in a car . You can only try. They can only say no.You cant lose as they have aready put a price to you. Good luck.
