@dealingoutdeals is a Twitter bot created by Chris Heinze:

@DealingOutDeals Tweets you when the price of an item on Amazon drops below a target amount. Simply send a Tweet to @DealingOutDeals with a link to the item you want and the price you want. We’ll frequently check the Amazon price and we’ll reply back when the price is below your target price. Direction can be found at dealingoutdeals.weebly.com.