I thought the same thing. How and why is this on Palm Springs CL?
A Partio cart strikes me as something that would have only been considered when building/remodeling a home or outdoor space. In any other case, it wouldn't likely have been plug & play, and in addition to the sales price one would have had to consider the cost of provisioning 240v service to the patio area, perhaps in addition to existing 240 service for a dryer and/or stove and/or oven, which could have required an entire service panel upgrade.
I can see why these are rare. They were overkill for the average backyard griller during the period they were being produced.