Partially wanting advice because I find myself in this situation, partially just curious what other people would do.
Say you had an entire extra rift bundle on top of the one you're actively using, including touch controllers and a pair of sensors; Would you sell it to make some quick extra cash (and maybe put some of that towards new VR apps)? Keep it to use as a back-up if your current system ever goes bad (maybe while putting all of the sensors to use now, so you can have an awesome room-scale setup)? Save it for a friend or family-member who wants to get into VR?
The next nerd to cry about "the resolution" of top-of-the-line VR devices will be permanently banned from using ALL standard-definition media. And yes, that includes all pre-Switch Nintendo games. Especially Melee.