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The fact that the Moog is inherently able to make sounds without power, but no other electrical ones get that is what really leans me to that. I know a Casio f-91W will last a long time, but the laser pointer and dab pen won't.
I am personally leaning towards the motorcycle and Moog. The motorcycle could be (poorly) fueled with distilled grain alcohol. Not fit for human consumption, but it could make it work. Eventually something will break on both, and you can't fix it. But you can be a form of traveling bard.
Plus if you keep the Moog, you can put it into a place that is safe, then have your later kin give it to some scientists in the 1800's. "Hey Maxwell, here's a literal magic device. See how it works. Figure out how it does this and what it can and can't do."
If the moog has infinite power you could build a really big capacitor and hook it up to it to make enough power to do other interesting things...