Amazon Ebay Price change overnight

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?

Sounds to me like the item was on sale. Amazon have just had a load of "Prime deals"
You need to be constantly checking your items for price changes.

CazuaL said:

Sounds to me like the item was on sale. Amazon have just had a load of "Prime deals"
You need to be constantly checking your items for price changes.

Click to expand...

I first posted it about 2 weeks ago. They didn't have prime deals until just a couple days ago I think. I could be wrong?
At the time, I didn't see anything that said it was a "sale" or "sale price". Is there anyway to know if some items are on sale price? It would be good to know if some prices that are listed in amazon are just temporary pricing like a 1 week sale promotion.

And for those of you have sell like 100,300, 500+ items....how on earth do you keep track of all the items each day to make sure the price didn't get jacked up on you? Surely nobody has the time to go through 200 listings and searches every single day to double check all items are A) in stock still and B) same price. Is there some sort of automated notification system that lets you know when an item you're watching is out of stock or the price changed?

If it's on sale it will say so next to the original price
A lot of people automate the process with custom bots which can cost a pretty penny to get made

CazuaL said:

If it's on sale it will say so next to the original price
A lot of people automate the process with custom bots which can cost a pretty penny to get made

Click to expand...

Yes, I suppose. So I guess the only way is to just "risk it" and hope that when the item sells for a certain price on
ebay, that amazon seller didn't hike up the price. If I only post a few items, I guess I can check it every couple days
but I don't know how one could keep track manually of 50 items even. Maybe just "bookmark" the page and it's the fastest way to load each page for each item rather than to type it in?

There all using price updating programs like skugrid or listerr.co.

Hello, you can check my system for arbitrage dropshippers http://www.blackhatworld.com/seo/dropship-arbitrage-software.856455/page-3#post-9076991. We do price check every 1 hour.

In the long run, you're better off getting a custom script to run your repricing rather than a monthly service. Once you decide this is a long term method you are going to persue, of course.

Cost of a script can be under $1000 and handle almost unlimited items per account/ebay store. If you look at the pricing of monthly programs you're looking at an absolute minimum of 50-100/month for a few hundred listings.

Always remember that a PHP script is yours forever and can be upgraded and tweaked to how you need it. Start with just the very basics to run your business like live repricing every 15min, listing creation and listing management. Then when you need more features hire a developer to add some.