When it comes to buying something like that used you never know what you are going to get,it may be fine or it can be in need of repairs, unless you know the guy and the history of them I would consider buying new at least you know what you got and if there is any warranty you will get that and if your not happy with them you can get your money back,those tracks can be put through torture and appear to be fine when in fact all the bearings are in bad shape if you can swing it get new if not remember don't look a gift horse in the mouth
