My boat is sitting on a trailer that has to be at least 20 years old. When I bought the boat back in September, the guy I bought the boat from towed it to my house as I followed him. The trailer seemed to tow fine and all the lights worked. As I type this, I know that it needs a new winch mechanism. I don't know the condition of the bearings, leaf springs, tires, etc. Basically, I'm just looking for some feedback as to when a trailer is deemed unfit/unsafe to tow.