You probably have never notices this, but most manufactures and suppliers will give away free samples of their high quality electronic parts.
However, control your self! Don't ask for hundreds of components! No company will give you that much, just ask for a few.
Here is a list of some companies and manufactures that will give you some of their free samples...Fairchild SemiconductorTexas InstrumentsSTMicroelectronicsMARLWIMA
For more information, check out this instructable! List Of **FREE STUFF** For your projects