Pricegrabber

Pricegrabber.com is a pretty good site to check for the lowest price of authentic new electronic items from officially authorized channels. For example, let's try my camera, Nikon D90.

You will find the prices vary from $759-$899, and dbuy.com offers the lowest price. There are reviews that you can check. You can then click on dbuy, and go to the site to buy directly.

You can try Apply Macbook, and you will find MacConnection has the lowest price at $989.99 + free tax + free shipping. 

I also tried iPad, but the prices came out ridiculously high. Maybe the product is still too new for the market. 

You can also compare prices of other daily items. For example, I'm thinking of buying a Mariner's woman jersey that I can wear to go watching Mariners play games.  FanEdge seems to have the lowest price at 64.99. Jeez... Too expensive. Time to try a non-authorized channel - eBay.