Ride On Lawn Mower

The in laws has a ride on they had bought 2nd hand because they have lots to mow in the summer right up to fall – i don’t blame them and the price was right – i think it was like $500.   While looking at some thermotox reviews – a friend called to ask if i wanted to get one too this summer – you see we are cheap and only has the regular mower.  I don’t mind it so much – but not being able to help and mow now that really suxs big time.  I really want to help the spouse with the garden and lawn.   So i’m looking out for a ride on – but how would one know if they were good if you are buying a previously owned and used one.  Pray tell.