Hobby is strong and the market for the collectibles is strong. At least where I am.
Condition and rarity will bring the money and is where the investments are being made.
People are starting to "invest" more in these types of things as the stock markets are to volotile (sp?) and it's almost like you need a degree to understand it all sometimes.
I would rather put my money in things I know about. That way it's my risk and nobody like Bernie Madoff is going to run off with my money. Some friends of mine in local trade unions took a HUGE hit here over that scumbag.
Buy quality and condition when you can and you won't go wrong. I also am into firearms and related fields and it's the exact same deal in those collecting areas.
Collect what you love, buy the best you can at the time, and you will enjoy it far more than a statement you get in the mail at the end of every financial quarter.
That's what I am doing.