Which brand bags are most expensive?

I'm curious to know, which brand bags are considered the most expensive in the market today? Are they from luxury fashion houses known for their exquisite craftsmanship and high-quality materials, or are there lesser-known brands that offer equally opulent and exorbitantly priced accessories? Could you elaborate on some of the key factors that contribute to the astronomical pricing of these elite handbags, such as their exclusivity, limited production runs, or the use of rare materials? I'm particularly interested in understanding what sets these bags apart from others and why they command such a premium in the luxury goods market.