Google has this website thoroughly indexed, so if you know what you are looking for, Google will know where to find it.
Ebay is a great place to buy used equipment, but you have to take care who you deal with since there are crooks and scammers on Ebay just like everywhere else. It's also reported that many of the memory cards being sold on Ebay right may fakes and may be either unreliable or may be lower in capacity then they are marked. Just be careful!
Amazon have very good prices, good customer service and a liberal return policy. On many items they also offer free shipping which can be a significant saving. I've bought everything from books to digital cameras and from watches to clothing from them and I've been quite happy with their service.
You can search for thousands of photographic and other products at Amazon.com via the search box below:
B&H Photo are one of NYC's most reputable camera stores. They're honest, have good customer service and returns are no problem. Many items ship for free.