Maybe it's a guessing game. Why didn't the seller reply? lol @Santinidollar From your posts I think you know a lot about this subject. IYO what grade would you give this coin?
In MS65 it’s a 20k dollar coin... so let me guess... he offered half of what it’s worth? I wouldn’t accept low ball offers either...
Even if the seller thought your offer was too low, they should have been professional and courteous enough to reply. If it's not sold maybe they're waiting for a higher offer.