Amazon craiglist and ebay monitoring program

I need a software program that I can enter some items for it to constantly watch amazon, ebay, and craiglist for. When someone posts that item for sale in a given price range that I can input, the software will email me or SMS me to alert me. The software needs 3 different tabs, one for amazon, ebay, and craigslist. It needs to check if someone has posted the given list of items every so many seconds ( i should be able to specify the time delay).