My 88 year old grand father died about ten years and his entire model train collection passed from my grand mother's estate to the grand children last year. All of the ~ 50/60 train cars are at least 30 years old. Most are probably 40 or 50 years old. And no one in the entire family knows anything about model trains! It's unlikely the trains will be put up for sale. Nevertheless, can anyone offer advice on how to how to get the train set cleaned and appraised? Thank you!