I recently got a metal tenor Gaia b-stock on eBay, at a really good price.
I had played a friends a couple times and was intrigued...but not intrigued enough to pay anywhere close to full price. (Probably cuz I knew I would never use it as a full-time, main mpc)
I found the ligature to be the most disappointing thing about the mpc. Once I got it off & experimented with other ligs that would fit, I found it added some much needed "character" to the mpc. (Which is my only criticism about the Gaia, its a very perfect mpc, perhaps a bit too perfect? )
On the positive side, the thing is manufactured beautifully, packaged beautifully, and, when comparing it to my friends Gaia, playing almost exactly the same. Really great work. I'm glad I got it & wont be selling it, even if it isn't my main mpc.
Plus, I agree that Theo is a great guy & always has been & have found his customer service to be excellent & speedy.