Create a Program that notifies me when new cars are listed

I am an auto dealer in the USA who buys very specific types of cars. I am looking for someone who can take my specific search parameters and then write a program to let me know when NEW listings appear for the cars that I am interested in. It would need to monitor [login to view URL], [login to view URL], [login to view URL], and ebay.com. It would involve writing a program that could search those specific sites every hour or two and then compare the listings from each search to see what is new. The new results would then be emailed to me. I am not a programmer so you may have a better idea of how to achieve the same results in a different manner. I am definitely open to ideas. Here is an example of what I am looking for. Say I am only looking for 2002-2005 Volvo s60 or v70 R vehicles that are advertised in all 48 states but not Hawaii or Alaska. The program would search the four websites above for those specific vehicles in that specific year range and then email me new listings as they appear online. I would need it to be sophisticated to not email me duplicate listings.