It may be.
Have you used a postage option with age verification?
The buyer will also need to pay with a credit card - no other payment method is acceptable.
You could simply reduce the price to the level of the offer and let the potential buyer know the price is now lower.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
