Nope, that won't be possible.
If you have paid the same amount that a pristine, sealed product costs, we'd rather you have a new unit instead of a demo unit.
If you wish to order the product, just let us know. Once you return the demo unit to us, we'll get it inspected after which we will place an order and dispatch a brand new product to you on the same address which you used while placing order for the Home Audition.