Board Thread:Wiki Discussion/@comment-4372541-20140503232118/@comment-4372541-20140727030419

I guess they reduce the prices over time so that the purchases are "achievable" for people with newer accounts, whereas people with older accounts probably had a lot more time/cash on their hands so it made sense back then. When I first saw the pricing for the Boardwalk pieces I baulked, but it seems that they have made it much easier now. I'm still on the 10k/2-day pieces. I wish I had kept better track of it too!

Not sure why they made some items unique when they previously allowed duplicates. If there was a way to sell items to other players then I would imagine you'd want to keep those items "rare" - but since this is not Neopets and you can't do that, I have no idea ;)