Quote Originally Posted by Vickii View Post
For example let’s say the price is 5k and it’s selling maybe once every few hours. Then along comes you and you want a quick sell so you drop it to 3k.

If I catch it and know the market then I can buy at 3k and sell at 5k. Minimal risk.

But if someone else sees it and goes 2999 then a 2998 then a 2997 and then a 1000... then I have to spend double the original selling price in order to buy all this stock. And there’s nothing to say that it’s not going to be plummeted again and be worth my time.
You're pretty much confirming here that you believe people are listing items faster than they sell. If they were selling fast enough then there would be no risk as you'd be guaranteed to sell all of your stock.

Quote Originally Posted by Vickii View Post
If everyone just sticks to 5k then we would all make decent return. You hurt yourself as much as me advocating this.
Technically yes. But if new suppliers enter the market while both demand and price stays constant, one of two things has to happen:
1. Time to sale increases
2. Transaction size decreases
Either of these result in an individual supplier selling less items over the same period of time, so less money. If you were selling the items alone and making one sale per two hours, a competitor appearing would double that interval. Another ten competitors later and you would only be selling one item a day. Maybe you'd still be making a decent return per item but you'd be selling much less.