This is an argument you can use with your senior management, when trying to sell Knowledge Management.
Knowledge is like treasure buried in your own back yard - it's a resource you already own; you just haven't uncovered it yet.
Any organisation is rich with knowledge, any organisation pays a lot for knowledge already (60% of the non-capital spend according to Larry Prusak). That knowledge is a very powerful resource, but it's mostly locked away in silos, and in the heads of individuals.
All you need to to, to release the value of that knowledge, is start to link up the people.
You don't need to buy the knowledge - you own it already. All you need to do it free it up to move to where it is needed.