Just tell her what you posted, those are actually pretty good reasons. I would think any good adult would be able to understand that without getting upset or offended. Plus you can add that its a collectors item and as such, worth much more in the box. Even if you dont sell it. The same applies for other things that are just for collection and are just to be appreciated an not used. And you can still be really stoked about it cause its a pretty cool gift. And even after all that, you can still add best wife ever. Cause really. Best wife ever.