IMO those would be tough to sell. There are so many other domains that might be shorter and available. Also, you could invest the money in other, shorter or catchier domains.
I just cant imagine a drone flying around selling things ? Can You.
Go for a brand drone name thats funny or can be used for anything if you are hand regging
Thanks for all your thoughts! I will try to sell them to drone companies, I think at least information drones is a concept that might be popular in time. Like you go to the Niagara falls, and you can rent a drone that will follow you on the tour, tell you about stuff, function as an umbrella, bring something to drink and a snack etc.