A service that lets you try high end items before you buy. So example speakers or TV or drones, you get to try them for a week and then decide if you want to keep it. If you do you're charged the price of the item, if not you can return it for free. My idea was to charge brands for the service and handle fulfillment and we keep a % of sales made.
I've had the opportunity to develop marketing strategies for various e-commerce portals offering similar kind of services.
Bitter truth : there are 1000s of service providers like that. Some even offering Jets on trial basis! It can't get more high-end than this.
Alternatively : You could create a better impact by narrowing your choice of items (and thus creating a niche for your business), complimenting your offering with value add services and/or creating FOMO through exclusivity (Ex: get to use latest model 3 days before official launch)
I'd be happy to help you further over a one-on-one discussion and devise a more robust plan of action.