Just to add to the previous post, the K-brand ukes being produced in Hawaii is the main reason of why they cost so much. With a high cost of living and apparently labor as well plus the production is very limited and with demand so high, the prices you see reflect that. An original Hawaiian instrument built in Hawaii by human hands can be a huge differentiating factor to many people, as opposed to Martin and in particular your C1k which was mass produced in Mexico, as noted in the previous post. Just take a look at the Martin's built in their US factory in Nazareth, PA and you'll see that the prices are pretty comparable to the Hawaiian-made ukes. Of the three K-brands you mentioned, Kanile'a has definitely got the smoothest finish since they buff and fill in the pores of the wood and use the same UV-cured polyester finish that Taylor guitars pioneered. Kamaka is legendary in the uke world since they are the original hawaiian-uke, having survived the Great Depression where other uke companies failed, they have been around for almost a century now. And as for KoAloha, they are relatively new, been making ukes since 1995 but have a unique, light-weight construction and sound that many players love, but in my experience not really the best in fit and finish of the K-brands you mentioned. If your looking for a high quality built instrument but don't want to spend the big bucks, I suggest looking at Pono, in my opinion, they have more consistent quality control and fit and finish compared to the likes of KoAloha and Kamaka.