Earlier today I was walking around VIP spawn and saw that to buy 1 diamond it cost 400 nubs!
 I do understand that since its an Adminshop that there is an unlimited supply (I think) But 400 for 1? that's a little bit outrages. I would buy them if they were between 200-275 (average price of a diamond)

 But then I walked back to the Entrance And it says 'cheaper items and sell then for more than the global shop' I guess the prices have fluctuated drastically Could this price be changed? For the end of v5 or for future uses in v6? any other VIP's or retired VIP's agree?

These prices were set at the start of V5, or whenever the VIP market was introduced, where everything was 2-3 times the price they are currently.

During the start of v5 Diamonds were traded and sold at between 2,000-3,000 and slowly decreased in price as the supply went up. This is something we are going to try keep and eye on in v6 and we have tools put in place to monitor the values of items. The tools will enable us to reduce the supply, which will therefore increase player demand and raise the worth of an item. We have ways to lower prices also if they inflate.