What I am looking for a site that I can put in ASIN numbers and then receive notifications whenever someone adds a listing to that ASIN. I need it to be able to keep notifying me each and every time someone adds another listing to that ASIN. I am basically looking for items that match certain condition variables (but I don't need or want the service to do any matching like that, just notify me whenever someone adds another listing). I haven't been able to find any service like this. Here's how you can make money on this: Make something like this and I will use it (maybe others would too). Include your affiliate code in the links so that whenever someone buys something you make money. I have bought items as high as $600 twice and many cheaper items - whenever I buy any items I will buy through your links if you make such a service. If you are interested let me know.
This might be what your looking for http://www.dealwhistle.com/ monitor amazon prices and see price trends?