Hi Everyone. I am thinking of purchasing a 1998 E350 15 passenger van with a 7.3 PSD that has 150,000 miles for $12,500. It is a one owner van. The van is stock and has never required major maintenance. The van was serviced regularly, and I do not think it did very much towing. I am interested in how many miles the transmission and engine are usually good for? How many miles do these vans do before major maintenance? What should I look for before purchasing the van? Thanks