What dog is worth the most money?

I'm curious to know, which breed of dog commands the highest price tag? Is it a rare purebred from a lineage of champions, or perhaps a unique hybrid with exceptional features? When it comes to dogs and their value, does it solely depend on their appearance, or are there other factors like pedigree, health, and training that contribute to their worth? I'm really interested in understanding what makes a dog so expensive and whether there's a specific breed or type that typically fetches the highest prices in the market.