I think the prices of a throne should vary on the method. If its a junk trade, it should be 20-30m, since you arent really gaining any money, just exchanging junk for cash. The other person isnt losing money either, just getting it back in junk. I honestly believe, that if you can transfer cash to somebody by some method & they gain pure profit, I'd say a throne then should be worth around 8m-10m.