It would be really cool especially if it was used to backstory or side character stuff.

I still regret not buying teh Slytherin track jacket from Hot Topic when they had it, and now it's long gone and a fortune on Ebay. The GF and I have some pretty hardcore geeky stuff, but then she got me Snape's wand for Christmas, and I got her Lucius' walking stick. She also has the tine turner thingee (although the Japanese version, not the Noble Collection one).