I bought one used a few months back and then got panicky about the possibility that the SAB problem MAY pop up and sold it. I broke even. I missed it very much and recently traded for another one. There's a nagging doubt in the back of my mind that something may go wrong, but I've got about $750 into it (compared to $900 in the first one). My hope is that if something goes wrong, that Fuji will cover me (it really is their fault regardless of who bought it), but if I have to pay up to repair it, I won't have paid that much more than the cost of a new one....and at that point, then I think I will have some sort of warranty on the new part.
If you're not in a rush, I think you'll see quite a few more on the used market once the X1-Pro (or whatever it's called) is out there and in circulation. You may even be able to find one with a warranty card (or someone willing to help you out and stand by your side in the event of SAB).
Just my 2 cents.
good luck in your search