That are very fair prices to be honest.
It is close to impossible to find them lower priced indeed especially boxed.
These collectors are very rare, certainly boxed, because by the time they were released there were not so many KC breeders.
So for the 2011 collection say before Halloween 2011 a relative high price needs to be payed frequently.
The kitties you request are very rare especially the
Leprekitty, only 100 excist, I wonder if you can find that one even and in a box would be a miracle LOL
I have seen a live Leprekitty for 150k so ...
Should you find one boxed I predict it has a price tag you will be shocked about.