Cost me 2 million plus and did not get anything but junk in return and 12500 sp

There are more achievement tiers for completing them now, so the prices are high because they are somewhat in demand. And also I believe that most of them can only be obtained by getting them in an RE, so it's not like you can buy them from an NPC shop or a special shop or anything. This makes them a bit more rare than some other items.

Thanks only did the 1 for entrance to blue building

thanks