I have one of the regular Sky King repops but never saw a delivery Sky King before. It looks the real deal to me, too, especially with those balloon tires! A more rare 1930s trike to find, that's for sure.
I had seen only a picture of only one other years ago- That`s a Rare Bird... Deluxe 1930s Tricycle and Wagon made together. I would guess in an Ebay situation, $500- $700 in your condition. Private Sale- maybe more, maybe less--Depends on your buyer.
It`s a nice piece...-----Cowboy