I sell them, but that will not help you much. Kits, as you correctly say, cost a lot of $, that you probably would like to recover if you sell them.
But kits, by their very nature, are duplicated in their hundreds, if not in their thousands, so they are not very much in demand from collectors. I never build kits at all, so I don't have to pay out much at all for materials. As it is just a hobby with me, I do not take private commissions. I just build whatever I feel like building. I have a group on Facebook called Merchant Ships In Miniature, which has over 600 members who like building merchant ship models. Usually, someone comes along shortly after I have completed a model, and wants to purchase it. At the moment, I am sold out. Since January, I have completed: collier brig
Sicily, barquentine
Bellmore, topsail schooner
Julia, and barque
Gulf Stream. They have all sold for hundreds of pounds. Because they are small, and in display cases, they are more popular than large ones. Collectors love them because they are different, being merchant ships, with not a gun or gunport in sight. In the past 26 years, I have built and sold over 260 of them! But I have found that over 90% of model shipbuilders cannot be persuaded to build anything other than warships. Even a small one like the
Irene will fetch well over £150. The hull of the
Irene
is only a few inches long. The other one in my hand , is the barque
East African, and it sold for several hundred pounds. A lot of model shipbuilders think it is dreadful that I sell them, but we simply don't have the space to keep them. The choice is simple. If you really want to sell you models, forget about kits!
Bob