OMG thats a bob cat Ransom classic (the real original!). We started with 2 of those years ago! Awsome little machines. They lasted forever to and cut absolutely awsome! To this day we regret selling them. I say if the machine runs good and operates correctly then you should buy it. With the variable speed tranny it has you can not use a velky on it and thats the only down side to it. also getting parts may prove to be a chore but the machine is so simple and easy to work on it isnt even funny.
2013 Gravely 460Z 29EFI
2011 Gravely 36GR
2008 Gravely 160Z
2004 Gravely 34Z
1998 Lazer Z HP 48 (old faithful)