Reserve list cards are very hot right now, due to unprecedented growth of the player base and a promise of the static supply of these cards. For years, many of these types of cards have been flatlining, but in the past year or two, many are making serious moves.
I also really like the flavor of this card. It's a strictly better version of War Barge, a kind of "vehicle". Quite unique.
I can see this over $10 in short order, and I see no downward force on the price, ever.