My point above about the Beanie Babies is if your into that or militaria as an investment you may someday be in for a rude awakening. I think just about anyone now thinks Beanie Babie collecting was pretty dumb. But have you considered just how much of the general public would also say the same thing about collecting militaria? For the record; I think it's pretty much agreed to that militaria has stood up well in holding it's value over time. However IMO: If you bought heavily(daggers for example) 3-5 years ago when prices were at their peak it may be quite some time before you can sell the items and even break even.
Again IMO: Enjoy militaria collecting at what it's supposed to be A HOBBY. If you eventually make some money collecting so be it.
Jim