I was the person in the first trade referred to. At the time I had 3 trades going on and didnt need some of the cards in the original offer. I did a counter offer and did indeed suggest the Koufax record breaker because the guy simply didnt have anything else I was interested in.
He declined the trade and I thought that was the end of it. I received a small package in the mail with the cards the guy had suggested for trade. I was confused by this as I thought he had declined the trade. By the way I had never accepted the trade merely countered.
I sent a message asking about it and asked if he wanted his cards back. He said yes of course. So what I did was send back his cards along with the cards he wanted to trade for. (Wanted to cover his stamp cost). I sent it back first class with tracking. I dont know what else I could have done. Oh and there is a negative comment on my account now because of this miscommunication.