Hello, the knife has not been used for anything by me, great shape. As for the age, I would guess less than 5 or 6 years old. Buck changed the steel on these to a less expensive 420 I believe. This model was superior because of the bos heat treating and the use of ats34. Super strong and holds an edge longer. I will ship it to Austrailia, however you must assume the liability, and pay the additional shipping. If anything "happens" to it , it does'nt blow back on me. Just as long as that's understood , I have no problem shipping it to you. Thanks for your interest. One more thing , the blade is stamped ats34 and BOS.