From Paris to Amsterdam by bus

How much is it to travel by bus from Paris to Amsterdam?
In Paris where is the place I can catch the bus and where do they drop us in Amsterdam?
If go by train, point to point is it cheaper than I buy the Euro Rail from my home town?

[ Edit: Edited on 04-Mar-2009, at 16:22 by kittchow ]

For all bus questions, visit the Eurolines website

As for train, point-to-point will be MUCH cheaper than Eurail, if it is your only journey.