I am the original owner and purchased new from my local Thiel authorized dealer. The cabinet is in pristine shape except for one missing sliver of veneer at the very bottom back right edge that must have been taken at the time of the original install. See pic.
The sub is in great working order and no issues to report. This is the last, remaining Thiel speaker I have.
I have no interest to ship this beast myself, so local pickup is encouraged, but will allow a buyer to arrange, pay and assume liability for shipping, if so desired. I would even consider meeting someone halfway, if within a 500 miles radius.
You can still find plenty of info on the Internet for this unit and the SmartSubs in general, but some basic specs: (2) 12" drivers, 167 lbs., 34"x16"x22.5".