A detachable base, for supporting an object as a flat-panel display comprises a base-plate, a supporting pillar, and a connecting assembly. The sleeve has a hollow sleeve body with a drum-centering portion with a first exterior surface of uniform diameter and a wheel-centering portion with a second exterior surface of uniform diameter the wheel centering portion being of a smaller diameter than the drum centering portion. One end of a roller can be left unsupported, either by separating a sidewall of the base structure or by separating an insert from the sidewall. A rotary driving disc fixed on the table rotation driving shalt is connected to a rotary table by plural torque transmission pins in torque transmission relationship. The system and method provide the caller with a reservation code, and inform the caller to call back at the particular time. For external merchant sites that require a consumer account before allowing the product to be purchased, the shopping site creates a new consumer account without intervention from the consumer.