Shevaroller has won at that 'marketing mash'. Thanks to his trading skills he managed to turn the 5000 TC into 2.196.633 TC in a month's time
The shop is a base price for the market I would say. A price is always lower in the market or on the forums. Technically, it's a base standard and things would be too cheap if the shop lowered. Let's not inflate or deflate currency anymore than we have to.
You can always use the market section (up the top, underneath the header) and items section of the forum to get better prices. That being said, I think that some of the prices in the shop are a little outdated and could do with an update.