GSXM 1?
IH 181?
There are too many copies available. The widespread availability of these books leads me to question their value as an investment. Of course, I've never been one to buy comics as an investment.
That being said, the price of these widely available keys continues to slowly creep up. But it just doesn't make any sense to me. I think the trend upwards is indicative of a bubble market.
As with any other investment, it's all about supply and demand. While the demand is strong, the supply is even stronger. Anyone with the means can make an eBay purchase within minutes. Go searching for either one of those comics and you'll have an easy time finding what you want.
With that in mind, I am truly astonished that some comics continue to creep upwards in price. For example, $800 for the first appearance of Deadpool? That's a joke. Same for ASM 300 or GSXM 1 or IH 181. There are just WAY too many of these books floating around.
Once again, we are in another bubble. Great time to sell, poor time to buy.
Take your money and invest it in stocks, bonds, precious metals, and commodities. That's the safest, surest bet. Not as sexy as having a GSXM 1, but a much wiser approach from an investment angle.