I'm new to this ebay/amazon dropshipping thing. I've sold a handful already but just noticed something really annoying and not sure if this is a common practice in Amazon or not. I found an item in Amazon selling for about $9 with prime. I sold it in ebay for $14. But today, I sold that same item again but when I went to Amazon to put in the order, I found out the exact same item and seller and EVERYONE ELSE selling it has doubled the price to like $18-27!!!!! WTH? It's like the whole world knew about it and upped their prices except me. Why do they this? So does this mean that one should always check every 24 hours every single item you are selling to make sure they didn't change the prices on you? This seems crazy that they can change prices like that so quickly and everyone seems to know about, too. It was just like a few days ago it was selling at $9 everywhere. Does it have to do with when it's out of stock and then the value becomes higher because nobody has it in stock? Will the price go back down or will stay at doubled the price??? How can we protect ourselves from this surprise pricing change? Is there some kind of automatic notification we can receive when an item we are listing or watching prices change?