2Doors - Amazon within your building

Imagine having tons of good stuff but having no safety net to sell it? Facebook Marketplace? Tons of scammers, random meetups and sketchy places, and headache of re-negotiating on the fly. What if we could create our own local Amazon inside each building. At the end of the day, a building is a vertical mini-town. There should be a place for your items and buying from others at a discounted price. After all, no shipping, no strangers, no driving to meet user my_name_is_your_father_32