PreSaver - www.presaver.com

I recently bought a set of dining room chairs via presaver and saved roughly $900 USD ($150 cheaper per chair) on the cheapest price I'd seen elsewhere after hours of googling and using alternative sites.

There's not much else to say, I was looking for a product and they showed me the cheapest price quickly painlessly.

The only negative point was that the website was a bit tricky to use on my iphone due to the length of the product descriptions - and they didn't seem to cover the mainstream stores like amazon or ebay; but that was a small price to pay considering I saved so much :)