"from what I can tell, these are rare"
You alone have 3400 of them. How on earth can they be rare?
I would wager you would be closer to the real number if you added a zero on the end.

If your current bidder is successful, ask him how many he already has. I think you will find he has a craps table and near 10,000 of them.

I give credit for one thing. You did disclose how many you have for sale and you pictured them. I dont disagree they are good looking chips. I doubt we are going to agree on anything else.