The most expensive item Costco sells? $329,999.99 'one of a kind' ring.

I was scrolling costco after purchasing the sweet deal they have on the security cameras right now and i came across this ring. Holy mackerel! its like, would you rather have a small-medium sized house? or a ring that would rival the pink panther?

In all seriousness - who would ever buy something like this that also shops at costco? like, what are they thinking by having this? and legitimate question - is this the most expensive thing that costco sells / has ever sold (not that this one has sold yet, apparently there is only one)?

Link

https://preview.redd.it/2qky61d25d1e1.png?width=1022&format=png&auto=webp&s=81d3c6054ca6ec5c5304256db4b86d1bccfd5445