A collector is someone who will collect certain products. For example someone could be a comic book collector. This person will purchase first edition comic books to add to their other books. A collector can obtain just about any type of product that they want. However the genius collector is one who goes after items that tend to have a high value. This takes us back to the comic books. Many first edition comic books can be sold for a few thousand dollars, especially if they are in mint condition.
Cars and a collector who has several of the vintage cars can also find a high value in the collection. It is possible to sell the items when the value goes up or keep them to view.