The solution is unfinished as reflected in the list of to do items. If you trust each other then you can just communicate the trade details however Centralized and Decentralized escrow are being implemented.
Great project and smooth GUI, safe escrow is what everyone wants, but is much harder than a simple noticeboard.
What do you think about decentralized escrow agents?
Utilize "real people" with a block chain based feedback and reputation system. These "real people" could charge a fee. Because the system has no trading fees it would still be cheaper than a centralized exchange and the goal of "getting coins out of a single hand" would be achieved. The complexity is quite small but...
There are two approaches to this:
1. You deposit funds into the escrow of your choice. When a trade completes each escrow agent handles the "trade". Crypto shows up in your designated deposit address.
2. When a trade completes each party deposits funds into a random high ranking escrow agent and they handle the "trade". Crypto shows up in your designated deposit address.
The first has the advantage of being fast during trades. The second is more like how a market place works. I suppose both could be achieved in code.
Please leave feedback.