Cut the sisters grass with it. Heck, cut her neighbor's grass with it while youre at it. That's called "trying it out". Listen to it, make a decision. The price sounds right.
The mower is at a dealer. It is on display there as a favor to the owner and sister who are in Florida. I'm in Maryland. There is very little grass to be cut at the dealer and it has already been cut.
I'm even more hesitant now because it's already September. If I buy this and don't get mine sold before winter then I have two mowers and a snow blower that need to be in the garage and there is not room for three pieces of equipment. Of course one could be left outside but I hate doing that.