I was keeping it, and tried with some to get someone else vaping (still trying).
With the rest, I got LUCKY here - was reading a thread about 510 batteries, and mentioned how I started on them, loved them, still had them but they were sitting, and MET someone who had just gotten a VAMO, but preferred her 510's.
So we swapped!
She got a bunch of like-new 510's, with a PCC, and a wall charger, and some fresh cartos...
I got a like-new VAMO, and top-notch batteries.
A win-win.
So - keep it, swap it, sell it, pass it along...all viable options!