I've never been one to collect things, but noticed these Biante Sandmans. My fiancée tells me to buy one as an investment, but really are they going to increase in value?

I've checked eBay and these things are not pulling that much in value probably because the real collectors get them when they are released.

I did drop off some mySandman.com.au business cards to the store owner, he has a lost of about 80 people ordering the Sandmans.