X-code just went for $25K. It was non-stock (390-2V changed to a 3x2, custom interior, paint, etc.). Still, only 53 'X' codes produced in 1968, so it was pretty rare (and could be returned to stock - that might have gotten a better price).
Tom
Note: X-code was lot #353, just went thru, so I expect lot #386.2 (the GT/CS) to go thru mid-afternoon. Hopefully they won't be doing a commercial or walk-around-BJ story at the time it goes thru.
Fingers crossed,
Tom