Yeah it'll turn the game into making profit. Buying a hat for cheap then selling it for more. People will get scammed, people will make noob accounts to trade all their money to their main, etc. there are definitly some positives to it like you can get a hat you wanted a lot, instead of selling furniture for 50% back you can sell it for 75% and people can get cheaper furniture, etc. it wouldnt be bad but I can just see a bunch of people trying to scam people out of their hats an such.