How much is a robot butler?

I'm curious to know, what would be the approximate cost of a robot butler in today's market? Is it a luxury item or does it fall within the realm of affordability for the average consumer? What kind of factors would determine the price of such a robot, and are there any specific brands or models that stand out as being particularly cost-effective or high-end? Additionally, would the price of a robot butler vary significantly depending on the region or country in which it is purchased?