I have one. I had a Saudi roommate in grad school about 30 years ago and her cousin found it cheaper to sell his oud to me before returning home and buy a new one than to ship it home. It has 5 double courses and room for a 6th course. When he tuned it, it sounded to me like the strings were in mandolin/fiddle type intervals, but went lower. Since I am not an instrumentalist, I knew I was unlikely to learn to play this fretless lute, but he did not charge me a lot and it is beautiful. The derivation of the word lute that I heard was that when the oud went to Spain with the Moors, they called it la oud, which became lute.