Doydie,
I think you will have to look at it and maybe have it checked out for wear and tear. I have one, a small three wheel scooter, that I use when necessary, like you said for travel or parks and uneven ground.

I use the store scooters when necessary, or my cane. It depends on relapse time. I have a basket on mine and a soft bag to hang on the back and a pole on the back to stick an umbrella in for the sun. It was $1000.00 new.

I don't charge mine unless I plan to use it. It could go dead I guess when not used or charged. So far I have been lucky.

I can't imagine the price of a new battery, but it has to be cheaper than buying a new scooter yourself. Find out the brand and check their web-site.
It sounds like a good deal.