What apps do you use for Amazon price tracking? That sounds like something I should check out.
there is an browser extension named Keepa, I have it se up with Firefox, but it might work on others too. this has been my main source of price and stock tracking at amazon, it basically tracks the amazon prices of used, new and collectible products and shows how it have been behaving in any period of time as a very nice graph of prices, including every category or only the ones selected.
This extension has been amazing, it can even set up alerts for different items and then when the product drops in the desired category below the ranged price, it sends an email to alert of the price. I have been tracking NES Mini since I installed the extension and the status info shows no prices whatsoever in any period of time, so it has never been in stock. (besides I have an alert for when it comes in stock)
curiously enough, I think it was someone on this same thread who suggested the extension.