So for this, I'm not clear on what benefits a Hive-based marketplace can offer over ebay/amazon/craigslist, etc. What is the problem you think this would solve for people?

You mention "banking the unbanked", which is a phrase thrown around all the time in regards to cryptocurrency but I'm not sure it's actually happened anywhere in any significant way (please correct me if I'm wrong here).

For your idea to be considered, you need to be very clear on the exact people it would be targeted to and what the problem is that those people have that this would solve, and also how you would plan to realistically get a critical mass of that audience to actually start using the service.

It's very easy to talk about ideas and make them sound amazing and awesome, but it's a completely different thing to make a realistic plan that has a good chance of succeeding in practice.