I was't going to say anything more, and just press on, but thought I needed to share with you. Sometimes an opportunity presents itself, and we are provided a gift to act upon it. That is what happened for me.
You and I also seem to have a difference of idea of the actions of a "seller" and a "buyer." I live by the following. A seller presents a product by listing the components to be sold thoroughly and often enthusiastically, answers questions provided by a buyer, and even, perhaps, provides a demonstration, if possible. A buyer will look at the product provided by the seller, identify if this is perhaps a match for needs and even wants, ask questions about items unsure, receive and weigh the answers received, and finally come to a decision and provide an offer to purchase. The seller will then either accept or reject the purchase offer. Both sides mutually agree and the transaction finalizes. You and I were only at the questions stage on your Typhoon H. I stated an interest for your Typhoon H or I would not have even sent you a reply, but had never given you a purchase offer. An opportunity on another drone, by chance if you want to say, presented itself locally, and I made a decision to purchase. I took the courtesy of letting you know that I would no longer be interested. You seem to have a good package for sale and I wish you with good luck. A buyer who wants and needs what you are selling will hopefully come forth. So, enjoy your Sunday.