Yeah, I saw those when I was looking to see if this had been posted before. None in my city. Not even sure if my youngest niece likes Monster High any more!
Argos have various Monster high dolls in the clearance section starting from £3.99 http://www.argos.co.uk/browse/toys/dolls-and-playsets/dolls/c:30381/brands:monster-high/ Stock seems to be very limited
Voted hot for the price (y) 🏻
As the Youtube review above mentions at 0:58, the very first Nefera De Nile doll goes for silly money - assume she's quite rare, eg: https://www.amazon.co.uk/Mattel-Monster-High-Nefera-Nile/dp/B006WAJM1A Can see this version on Amazon from a third-party seller for £21.95 https://www.amazon.co.uk/Monster-High-York-Schemes-Nefera/dp/B00S2L0EOQ