Definately go to e-bay. You'll get a better deal on the same chip than anywhere else. I did many hours of research and now own 3000 chips for home tourneys.
Just beware of the shipping costs some of these guys try to charge. They make the chip prices low and the shipping/handling is outrageous.
Also, there is one merchant in particular I will warn you about. He uses the e-bay screen name of FIRQUAL. Do not deal with this *****. PayPal
investigated my complaint and refunded my money, but this guy is not worth your hassle.