I've had one one of these from brand new, which was bought from a Game Exchange in Lancashire (UK).
Though not a collector as such, as I like to use what I have, I do like to keep things in good nick & always keep my boxes. Though with this; my house was broken into & this & my Wii box were ripped apart :'( (luckily I had my DS with me
& my Wii was at a friend's house).
It's pretty much been housed in a decent DS soft case for as long as I've had it, so aside from the usual light surface marks (& the clear plastic on the sticker on the back lifting slightly), it's still in very good condition.
Anywho, I didn't actually know it was so rare until recently & I was reluctantly thinking about listing it on ebay, as I was in need of some quick cash. I knew it had value (as it's Zelda), though some of these prices are crazy. Still,I'm certainly glad I didn't now