Iron Draggon nailed it in his last post.
As with anything collectible, there comes a time when you step over the threshhold from being a collector to being a COLLECTOR. When you start paying the big bux you've reached the point where everything is open and no price is too steep in order to acquire what you need. It's where the old saying "you can't get wetter than wet" comes into play.
I'm sure that there are many of you here that have another collecting jones that runs you more money than your videogame hobby.