I do not believe these is any financial collectability in die cast cars and trucks. When my club buys a train collection we usually tell the seller if they want we will take the die cast cars off their hands if they want but what we offer is usually based on the trains in the collection. If they are scale either HO or O we end up selling them under $10 depending on the scale. If they are a odd ball scale we end up putting them in the 2 for a dollar box or give them to kids during open house season.
JohnB