I bought a "builder-blemished" soprano directly from KoAloha. It was in the $400 neighborhood including shipping (but no case). They sent me pictures (close-ups) of two 'ukes and let me decide which one to send. If I showed you the 'uke, you probably wouldn't notice what they considered a blemish. They guarantee the 'uke for life and it follows the 'uke and not the the original buyer.
Give them a call to see if they have any available.
It's so hard...I have a couple of good leads. Interestingly, KoAloha did not have a great price on the blemish when I called. Maybe they didn't like the way I sounded...
Since I have not played it much I was going to message you to see if you'd be interested in buying it. When I got it out of the case and played it a bit I realized that it sounds and plays great and I could not part with it.
Be patient, you'll find your Kamaka, they come up here and on the Flea Market. You'll be rewarded for your patience with a nice uke!
I bought my Koaloha new but waited, rather impatiently I have to admit, for a used Kamaka that fit my dwindling budget. However, the wait was definitely worth it!