I'd bet a good amount of money you wont get any offers that are over 300$, not much over anyways. Honestly I think 250 is even a bit much for this game when you only have 200k.
Anyways I'll offer 300$ for it and that's generous coming from me.
If not GL on the sale. If you care about the account you should just keep it, cause it's very likely you won't get much higher offers, but hey good for you if you prove me wrong.