Very recently, on amazon.com, the LEGO HP sets are becoming exceedingly rare.
For example, the newest version of the Hogwarts castle, based off the fifth HP film,
now costs $369.99. previously released $9.99 sets for movies 3 and 4 now cost double their original price. The HP LEGO sets are now becoming a collector's item.
So,a suggestion to those who want to get the sets. Get them now, before they get even more expensive then they already are. To the LEGO HP sets, I quote from
William Shakespeare: "Parting is such sweet sorrow".