What's the point of buying figures just to re-sell them down the road? You might as well just open up an eBay shop if you're never going to open anything. .. and if you can afford a figure hobby long term, chances are pretty good you don't need the money unless it's an emergency.
I can see leaving action figures in their boxes, but for really nice PVC figures, if you love them, you should really take them out and display them. Most of them look like crap in their boxes because they've got so much blister packaging. It physically pains me to see people displaying expensive figures in the form of a wall of unopened boxes. Not to mention that some figures can actually become damaged from being left in the boxes too long. (I know at the very least, that this happens to Goodsmile company's figures in particular.)
Steering away from a collector's mentality of never opening and enjoying things because they will be worth more someday can be difficult, but at least for me, I try to buy things because I love them. (Then again, I know a lot of people who tend to buy things and then get sick of them really quickly and re-sell them. Personally, I just can't imagine being that fickle.)
