How buying works

Prices are held on the server, not in your browser, so what you are charged is what the catalog says. Selling an item back pays 40% of what it cost, which is deliberately a bad deal: it is there to recover something from a mistake, not to trade.

Items, Bloks and Gems are traded for each other and for nothing else. There is no way to buy either with real money, and no plan to add one. More about the currencies.