Also, some pen brands are very collectible, though to be fair, some of them are expensive to begin with, so it's more a matter of holding value rather than going up. The closest thing to GEC in the Pen world might be Retro 51. They are a rollerball/fountain pen company who does an endless series of numbered, limited run pens for a large variety of stationary stores (and other places), and once those runs sell out, the pens can sometimes suddenly be worth two or three times the initial cost on secondary. I collect R51s, and learned early on: get them when they drop, or you'll never see 'em again at that price.