I've just come up with this idea and wanna know if it's a good idea or not

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Why don't we have a shop that sells rare items with super high FPs price (Like the hidden tower on neopets).
For example: we can buy the old yukata (elegent, blue flower ...) from other player for around 150~175k. This shop will sell it for 200k
This can:
- Decrease the FPs ammount that flow around our kingdom
- People who has burning dream can set a goal for their dream item. (Sometimes, you have FPs, FCs but still can't find anyone who sell your wanted item)
- Make sure that old items will never be wiped out of kofk (When old player quitted playing)
- It doesn't make the rare item loose it current price (Since the shop price > market price)