These are common sites to find good electronics deals.
www.amazon.com (Commonly has things marked down large percents)
www.froogle.com (Pricefinder Search Engine That uses the Google Engine to Find the prices)
www.pricewatch.com (Large listing of many products and low prices from verified sellers)
www.outpost.com (Fry's Electronics website Rebate and Price Cutdown heaven)
www.Tigerdirect.com (Great Prices and Large Selection)
www.newegg.com (Huge selection, good prices - Added by Uranium)
As More Sites Come Along They Will Be Added Enjoy