I'm concerened that there aren't these 2 certain ideas already in Wizard 101.
One of them is crowns for large amounts of gold. It could be like gold for crowns, but reversed prices. For example, 7100 crowns for 1000 gold.
Another is refunds. I bought a four-thousand gold item, and couldn't use it, and if I sell it, all I'll get is 21 gold back. That's the worst selling system ever!