IRIS costs

I'm a new practice and am just about to sign up to Iris.  As reflected in many of the threads here the licence costs are very expensive in comparison to competitors but, having done my research (and having used Iris previously when I worked as an employee in practice), I have decided that the efficiencies it offers make it worth the expense.

The sales rep I've been dealing with has told me that "regrettably" he has absolutely no room for manouever on the cost and that every subscriber to Iris is subject to exactly the same fee structure. 

He's quoted me £744 + VAT for a 10 business (plus 20 personal) licence and a further £152 + VAT for a 10 client company secretarial licence.

Unsurprisingly I can't find any pricing information at all on the Iris website, so before I sign my life away on this could anyone confirm that this is the fixed price for this licence and that there really is no room for negotiation?

Any advice would be much appreciated.