I made it known that I was interested in the product and asked for banking details so that I may purchase it because I understood that the product would be sold to the first buyer

I made it known that I was interested in the product and asked for banking details so that I may purchase it because I understood that the product would be sold to the first buyer . communication between myself and the seller was direct and quick however when I asked for the banking details, the seller went silent. I was not notified from then on whether the product was still available or not. I wasn’t even told if there was another person interested at the time I made it known that I was interested.