Ever made a big purchase, only to find out later that the item went on sale? Rather than leave your finances up to chance, check out Priceprotectr before you buy. Once you complete the free e-mail registration, Priceprotectr will let you know of price drops on your recent purchases. As long as the store you shopped at has a price protection policy in place, you'll be able to recoup the difference between what you paid and the new price. The site even provides free forms and advice to help you secure your refund. To ensure the best price before you buy, sign up for low price alerts to help you time your purchases just right from the beginning and cut costs.