I have a 60 year old complete encyclopedia collection, it has approximately 35-45 books, it is in perfect condition and the books are very very dense, on short notice I had to move halfway across the country and that is really the only thing I need mailed to me, but I am on a limited budget, so what are the cheapest options available if I were to have someone mail them to me? Also, as I said they are old, heavy, and still in great condition so I need to know they will be handled respectfully and carefully