personally I dont collect carded/boxed stuff, I find it far to tempting to rip open the packaging and get to the sweet nectar contained within !!!
besides you can have much more fun with a handful of loose figures than you can with carded ones, unless you could pretend they had been encased in carbonite ?
I suppose this is a bit "topsy turvey" but my kids are often picking up action force weapons and stuff from my bedroom carpet.