Our institution buys from RM because of their "Educational Discount". As far as I can see they charge more than other companies for older and more archaic stock and then just add a second even higher price to say that this is what it would be without the discount. I had to spec up a machine for a colleague. I was able to knock nearly a hundred quid off the cost for an equivalent PC from another supplier (the one I buy my home kit from) but told no - I had to buy from the approved supplier. It's a racket.
I'll be fair and say that their support has been fine on the rare occasions that I needed it, but that was, like, once.