I also noticed that the used circuit prices are really not great, and pretty darn close to what my local mom & pop shop charges for a new one.
Once in a while you see one that might save you a Benjamin Franklin off new (factoring in taxes), but you definitely need to be patient and hunt them down as I suspect they are few and far between & grabbed up pretty quickly.
Well, I've now had the mini for around 5 months. I still love the snot out of the guitar and play it very frequently. Probably more so than my 814 for two reasons:
1) The mini hangs on the wall and not in a case with a humidifier. This makes it quick and easy to grab and play even if its just for 10 minutes.
2) Size size size. I take it on any long car ride where my wife is willing to drive, and I play/practice sitting in the passenger seat
3) It almost always comes with me on any overnight trip because its so darn small and easy to toss around in the taylor bag (I have a hard case but only use it on flights)
4) I'm way less concerned about "life" happening to the mini, so I'll grab it and play by the campfire, or sitting on the front porch without a second thought.
I've really grown to love the sound of the guitar as well. That makes it sound like I didn't like the sound when I bought it, but that isn't what I mean. I appreciate the difference in the Koa Mini vs my 814 more and more as time goes on. The 814 out classes her in playability and overall tone/sound, but the Koa has some deep mojo that definitely sets it apart from my big girl and it makes it a joy to play and not just a convenience.
Also, ... my wife and I have a daughter on the way. I'm of course convinced she'll be a musician (god ... please make her a musician and not an athlete

.
If she does end up playing, I plan on this being the guitar she can learn on and enjoy with those small growing hands.
If you can't tell ... we all want you to take the plunge
