If you look at the history of collecting sports cards, model trains and cars
    and of course, comic, you would know that their value always goes up for
    those in pristine shape.

    Collecting sports cards, trains, model cars or comic books, as any boy or
    former boy will tell you, has long been as much a rite of masculine passage as
    scraped knees. A boy might collect hockey cards, or comic books, or stamps,
    or coins and one day he might even become a big-time wealthy collector. But
    until the past few years, card collecting mostly remained just that - a
    boyhood passion .

    But the pursuit, it seems, has lost some of its innocence. When individual
    cards are selling for thousands of dollars each, it's not surprising that
    adults want a major slice of the action. Competition is fierce, innovative, in a
    business that has been skyrocketing since the mid-1980s. It's nothing like the
    early years.

    Marketing people some time ago realized that assembling toys in
    "collections" makes dollars and sense. Thus, lines of GI Joes and Ninja
    Turtles and Barbies and Transformers and Miss Piggies that fill closets all
    over the world.

    But cards are another thing. When kids are laying out relatively heavy money
    (most get it, one presumes, from their parents), and they are able to keep
    them in pristine condition for 20 or 30 years, they will have a bright future
    in retirement.

    Memorabilia collecting is a great hobby and is essentially harmless and
    historically it is a good bet.
What Is the Future For Collectibles?
Business Prospects For Collectibles
Title For Collectible Model Trains, Cars, Comic Books, Sports Cards, Figurines and Gems