http://www.efaucets.com/
http://www.luxuryhomeoutlet.com
http://www.faucetdepot.com
http://www.plumbersurplus.com

We had a bathroom built in our basement a few years ago. I ordered almost everything from FaucetDirect. They, by far, had the best prices. Delivery was prompt, and I liked that I could pay them through PayPal. The only think I didn't like was that the heavier items were curbside delivery. Then again, so are most companies.

For me it's qualitybath.com. They often post discounts codes, like on weekends. I bought all mine Hansgrohe shower plumbing stuff from them. None of the other sites came close.
Also, check homecenter.com.

Thanks for the tip about qualitybath.com. I found a Hansgrohe shower there a *lot* cheaper than anywhere else, so I went ahead and ordered it. What I don't like is that there's no indication of whether or not the item is in stock. Some of the other sites are better with that information.

We found the model name &/or number of our items & did a google search for them.
Selected their shopping section & sorted the prices from all their vendors.

While we loved faucetdirect.com & their service, using the google method, we were able to save hundreds off faucetdirect.com by using others via google shopping.

Just another idea for you to save money.