[dev1251] Penalty for using market search feature

[KrissKringle]

When you go shopping at a store you pay the tax on the item that you buy, the store doesn't play the tax for you.

So if anything, people putting up items shouldn't get taxed, people buying should.

This isn't real life, this is a game. There needs to be balance and this is a a wonderful idea for a gil sink -- at least in comparison to the ideas some of the other players have suggested.