I’m looking at buying an older self propelled commercial Snapper mower with a Briggs & Stratton 5Hp engine with a sticker saying “Cast Iron Sleeve”. I don’t know the date it was manufactured but I think they are better machines but concerned if it breaks I will not be able get parts. Considering the new disposable machines corporations sell us today I think the machines manufactured prior to the 90’s were better built. Any thoughts or concerns I should be aware of when purchasing an older model Snapper or, what problems to look for when I inspect this machine?