Worth checking out for procurement professionals is Pro Purchaser, a Canadian provider of market information. What I like about the service these guys provide is that it is all about common sense.
At first sight the site seems incredibly basic. It only has monthly updates of pricing information, for example. But the real value is in the combination of pricing information and “Negotiating Nuggets” – reports that Pro Purchaser produce on various aspects of negotiating.
For example, if you are wondering how useful monthly prices are going to be to you as a buyer, here’s a great Negotiating Nugget from Pro Purchaser called Direction matters more than accuracy.