Abstract: The current invention is modular housing system which includes a docking or support structure and a plurality of removable, transferable, and customizable modular housing units. The docking/support structure provides all the basic utilities for each housing unit as well as a permanent, stationary location for accommodating each of a number of modular housing units in a dense urban environment without disrupting or altering the character of the surrounding neighborhood. Each housing unit is a self-contained living unit and includes all the basic necessities and features including a kitchen, living area, and bedroom. Each housing unit may further be vinyl wrapped so as to cosmetically match the housing units to the surrounding neighborhood or to provide any appearance desired by the owner/user.

Abstract: An apparatus for automatically assaying an item made of at least one precious metal and selectively offering payment in exchange includes a user interface and control circuit; a trolley for carrying and moving the item within the apparatus; a first camera to image the item; an electronic weighing scale, and an x-ray fluorescence engine. The trolley carrying the item moves onto the weighing scale to establish a weight of the item and moves the item into the x-ray fluorescence engine to perform an x-ray fluorescence assay of the item at a location determined through image processing a visual survey of the item performed by the first camera. The user interface and control circuit creates an offer of purchase of the item based on weight and x-ray fluorescence assay of the item.