Here's a wonderfully fun instrument that started life as a lightly used Keith Urban Junior Player travel guitar but has been converted into an eight-string instrument. Depending on the strings, tuning and musical style this can now be played as an octave mandolin, a double-strung tenor or plectrum guitar, a cello-mando, or even just a regular six-string.
Currently tuned GDAE as a 8-string Tenor guitar or octave mandolin, the G and D courses both have a high string tuned an octave up, giving the instrument a lighter echo that sounds lovely and produces sweet harmonic overtones. Playing absolutely beautifully with resonance and clarity of tone.
The underlying guitar is a great little instrument, in excellent, lightly used physical condition. In particular the nut width on this model is unusually narrow at 39mm, putting it closer to the range of a custom built octave mandolin or bouzouki (35-37mm) than a typical acoustic guitar (43-45mm). Perfect low action, room on the saddle, working truss rod. Very nice cosmetically overall, however this came to me with a lifted bridge. It's been solidly reglued and should not be of further concern, but the repair is visible particularly from the string-side of the bridge.
I am happy to set this up however you like before shipping if purchased at the asking price, or for a small charge otherwise. There are a TON of different configurations this instrument can play in, and I'm sure you will think of more. For any given setup, I customize the string gauges as well, to ensure good playability and prevent overloading the guitar.
The conversion process entailed, among other steps, resizing tuner holes, fitting two additional tuners, adapting the nut, leveling the saddle, and adding four bridge pin holes in the correct positions. The original pin holes and nut slots are retained allowing the instrument to be returned to a six-string configuration easily.
Shipping available, fast and well protected in its stock padded gig bag, which is a bit torn and has a broken strap but is otherwise functional.
By the way, I'm happy to do a similar conversion on your instrument, either something you already own or a model you buy new for the purpose. Not all acoustic guitars can easily accommodate the extra pins and tuners, but many can. Shoot me a message if you're interested!