jerryc41 wrote:
Adorama, Amazon, B&H, Cameta, Costco, Crutchfield, Hunt's, KEH, Robert's, and probably some others. An authorized dealer will be approved by the manufacturer, so it will be reputable, and the prices will be just about the same from one seller to another. If someone is selling at a significantly lower price, then it's either gray market or unauthorized.
Look for refurbished or used to save money.