Bought 1970-S SD On Ebay...

Shoot I would tell him it's a large date and ask him what he will do to fix it. I always give them a chance. I had one guy say keep it and sent me another coin that was the correct variety. I had a roll get lost in the mail it was tracked to post office where it sat for over 12 days. I wrote seller and he said yeah his post office there is no good and he sent another roll. I got that roll and then 2 days later got the first roll. I told him about it and said I could send it back or just pay the same price for the second roll and he said just keep it. It wasn't a big deal it was only a roll of 1961 obw cents