If you haven’t already lost these because she’s not responding, you soon will. Noones going to honor that you found these, and she’s going to get 100 messages. Take this down, and I’ll point you in the direction of TX PCFers.
I think these were gone when she stopped responding. Most likely someone contacted her and said “these are worth more than that, I will give you $XXX.00 to ship them, which is a fair price”.
I’d recommend that when you find these you offer to pay a fair price to lock in your deal from the start - even at $200 shipped you would have a screaming deal and the seller is happy to work with you usually no matter how many others contact them.