Amazon Price Tracker helps you to list products you want to track on a Google Sheet. It automatically updates the latest availability information and alerts when it reaches a certain price.
Interesting approach, @labnol. I did not know there was an Amazon Advertising API (assuming that is what lets you track inventory as well) but this is a nice wrapper around it.
Do you see this becoming available in a different view like a website (borderline CamelCamelCamel) besides a Google Spreadsheet (which I assume will require some permissions on your drive account unless you 'own' the Google spreadsheet).
@john_amadeo Basically you could use these lists to work out which products are changing in price and promote them to users as part of the Amazon Associates program, therefore earning 5-7% of the sale commission.
@theashtube Agreed. I can only really see this being used for that purpose. For just regular deal hunters, I'd recommend the Keepa Chrome extension. It lets you set up email alerts for products, and embeds a lot of useful data on the Amazon product page itself.
Waatcher