I think of NOS much the same that I do a used guitar. Yes, it's possible that there is something about the guitar that might make it less desirable, but then again, just because it was something someone else didn't want, it doesn't make it a bad guitar. It just means it wasn't quite what someone else wanted, and lucky me! It's always best to be able to play it, but if it's an online purchase, just make sure of the return policy, just in case (BTW, I feel that way about any online guitar purchase.). I bought a Taylor 710ce that had been on the wall of my local music store for 6 years. The 710ce was a dreadnaught, and people looking for Taylor acoustic guitars seemed to prefer the Grand Concert shape. Lucky for me, because I fell in love with the sound and feel of the 710ce from the first time I played it in the store. We've been together for 4 years now.