Wikileaks for prices

With notable exceptions marked "price on application" (which are really only for rich people anyway), pricing data in the business-to-consumer market is abundant. Price comparison websites have made the job of accessing this already-available price data all the easier.

But in the business-to-business market, deals are still done behind closed doors, and pricing data is more difficult to come by. What we need is a Wikileaks for B2B pricing. Participants could anonymously submit pricing data about goods and services that they had bought, making for a more competitive and dynamic market.

(This is really just a more specific version of my suggestion of a heuristics website).