Which one if any should I buy?

[SouthallMowing]

MOWER 1:
Good brand, seems as though something has to be wrong with it for this price, unless they are in mad need of money.

http://chillicothe.craigslist.org/for/2621264872.html

MOWER 2:
Not sure what brand it is, can anyone help out?

http://columbus.craigslist.org/grd/2599823367.html

[Ryan's Lawn Care]

the gravely it has a better motor on it and it's a vtwin which is even better will keep it from bogging as a easily as single cylinder motors do. It looks to be a 15 hp kawasaki motor i have one on my bobcat walk behind and they are easy to start. Also being a belt drive it will be easy to work on the other one is a hydro also the deck height doesn't appear to be adjustable like on the gravely.