Why is Welsh corgi expensive?

Could you elaborate on the reasons behind the high cost of Welsh Corgis? Are they inherently rare, requiring specific breeding techniques or rigorous health screenings? Are their unique physical traits and temperaments in high demand among dog owners? Do they require specialized care or training that adds to their overall expense? Perhaps their popularity in media and culture has driven up prices? It would be interesting to understand the economic and cultural factors that contribute to the high price tag of these dogs.