I have the earlier modle of the S6. They did experience early production problems matching the fretboard to the body. Mine was one of them.
My advice is to play the guitar before buying. Make sure the fretborad is straight and the frets are all even down the board. Mine has a dip at fret number 14 due the problem stated above. Open chords play well. Barre chords up the neck begin to buzz the further up I go.
I had it looked at one time. The repair tech could not fix the problem.
Hope this helps.
Guitars:
Electric: Washburn HB-30, Squier Tele Custom Deluxe, Jay Turser Strat.
Acoustic: Seagull S6.
AMPs: VOX AD30VT, Peavey Envoy 110.
Modelers: V-AMP 2, Digitech RP-100A.
Pedals: Boss RC-2 Loop Station, Boss CE-5 Chorus Ensemble, Digitech Bad Monkey, Ibanez DE7 Delay/Echo, DOD VFX40B 7-Band Graphic EQ, Ibanez CS-5 Super Chorus.