I am going to mark this geocoin as "missing."
The last holder of the coin, KleinerFlieger, hasn't logged onto geocaching.com since the same day s/he picked up the coin.
Also, I no longer live in Texas, and so wouldn't be able to receive the coin in this unique trade & travel mission, anyway. Maybe the coin will return to the game, at which time I will give it a new mission! Until then, time will tell...