Gayageum

This is pretty cool.  Luna Lee playing Another Brick in the Wall on a gayageum via Laughing Squid.  Per Wikipedia a gayageum has 12-21 strings, up to 25, and 21 is common in North Korea.  You can get a 25-stringer on Amazon for about $4,000.  And $63.25 in shipping.

http://laughingsquid.com/a-brilliant-version-of-pink-floyds-another-brick-in-the-wall-played-on-a-traditional-korean-gayageum/