[flignats]

They can do whatever they want with it after they have sold it to me for a fixed price.

[coralreef]

Heh, I'm not sure why you think its a fixed price. They're probably showing you the lowest sell order on the order book.

[flignats]

Have you ever bought/sold on CB? It is exactly that, a fixed price. It's the convenience you pay for to use CB. That price updates frequently, but whatever price you execute at is the price you pay/sell for.