Switching back and forth between buy and sell window is a bit of a time waster.
The item has to be dragged twice:
First to the buy window to discover it's current selling price point.
Second to the sell window to actually sell it.
This process could be optimized by having a single "item window" above the exchange.
So that it is decoupled from buying/selling.
This way the user can either buy and/or sell it at the same time without having to switch windows and without having to drag and drop it twice ! <- which is a big time waster.
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