The best deal on a bit of kit like that is to look for a good dealer who is near to you and can give you the support you need. It is not a mail order product, and rightly so (for one thing it weighs a ton!). With us (for customers in Kent) we would I'm sure consider negotiating a price, but also if local would help you install it free of charge so that we know it is installed and running correctly. This is a better deal than saving an extra bit of money, taking a day off to wait for the delivery, taking another one when the first date doesn't materialise, and then looking at the thing wondering how on earth to get it up and running *at it's full potential*.