Im looking to buy a scag turf tiger but the problem is that the gearbox is leaking gear fluid. I guess the gears are working fine, its just that the box leaks fluid. I was told from the guy selling it that i could buy a new gearbox for $350. Does this price sound right to you guys? Should i be careful looking at this machine. Also, it seems like gearboxs are pretty common problems on scags, am i right?