I think the music shop is unlikely to know the value of the Kiwaya uke.
Takume is the distributor for Kiwaya (called Famous in Japan) in the USA.
Click Kiwaya on the website to see info about your uke, perhaps, if it is newer model.
Here's another website about Kiwaya Famous:
If you email the Takume website, Hitomi (as seen in this video with Aldrine) is most likely to email you back, she is lovely and will tell you about your uke, if you shoot her some photos.
If it's an upper level model, have a luthier repair it.
If it's a lower level model, have your relative take a crack at it.
Hope that helps, and do tell us what comes of it, normagal in Wisconsin. Steve in Illinois.
Martin Sopranos: 0M: 30, 64 --- 1M: 22Dit, 23Dit, 49, 55
2M: 22, 23Dit, 49, 60, 12 --- 2K: 25, 12
3M: 25, 48, 12(c)
Martin Tenor & Concert 1M 40
The Gibsons: Styles 1&2&3 28; Gretsch American 30
Asturias Japan SuperSop/Tonks 28,30/Favilla 55
Kiwaya Thinline KS-0P Soprano
Ko'olau CE-1s: Koa Tenor & Myrtle Tenor/Koa T100
Pono Maple Tenor, BE Acacia Bari & MS Sop