Long story, this guy lowballs me for $480 and claims it’s for charity. I ignore the message and he messages again asking me what price I would take. I actually discussed with my brother on what he would accept if it was his card (I told the buyer that it was his card hoping the buyer would not keep haggling back and forth).
I told the buyer $950 and he agreed to bid on it for 950 or have me create a new listing. To avoid me canceling the bid listing, I agreed to have him bid and once it reaches $950 for him, I would end it for him as the winner.
He bids and I assume everything is good. He then wants me to end the bidding at $830. I don’t as that wasn’t our deal at all. A bidding war between him and two others ensue but he still wins the card at $910 which is completely fine.
He wants $60 back at first and I’m thinking that’s the biggest joke as I can just second chance offer either the bidder below him 2nd guy below him.
I let him know and he wants $50 back instead. I see at this point he probably will either want a partial refund or to cancel the card which I was more than willing to do.
I try to input a discount of $30 in hopes that he would stop extorting me for money and pay that day like he said earlier. unfortunately it didn’t go through. He then asks for $50 after he pay either today or tomorrow.
I agree to a partial refund, but I already said no to $50. The next day he pays at night and then wants me to ship without the verification process to Canada. I know better than to do that and tell him no. He then wants me to show him the policy where it says I can’t. I do that and he shuts up for a bit. A Couple days later he has the audacity to request positive feedback. I tell him once he receives everything I would.
Next day he asks about partial refund once more, so I agree to give him a $10 refund as the next bidder below him bid more than that and I never agreed to give him $50.
He then messages me and wants the $30 I originally discussed with him if he was to pay that day rather than me canceling and offering to the next highest bidder.
I then tell him I offered a partial refund after he paid but never specified the amount as he wanted $50 but I already told him no and then the $30 I originally had was so he would pay that day but didn’t. I then point him to the message where he said he would do $950 but it ended short and I didn’t complain.
Then the last message is him calling me a sociopath and threatening to return the card if I don’t give him $20. I tell him that he can do what he wants once he receives the card from the eBay’s authentication process as this purchase is final sale and I have no return policy. He now messaged me asking for the additional $20 again, this time I ask if he agrees to my terms to stop contacting me, I will give him the $20.
Now He wants $40 
Honestly I should have just blocked him after the lowball offer, the silver lining is this has kept the last few days interesting. This ordeal makes me happy that I rarely sell.
My mistake here was not understanding that he wanted me to end at $830 not the agreed upon $950.
If interested here is the conversation.
