SH5 constantly being developed by our talented modders, SH3, SH4 has been longer, while the SH3 ... would be called the core of the series, but all three of these changes ... I suggest you take the time to look around to see which of the versions you want .. and you can trade them favorably on amazon,link here
http://www.amazon.com/s/ref=nb_sb_no...hunter&x=0&y=0