With it sitting that long I would expect it to be dead. Ive learned the hard way good batteries & boards are tough to find.
My experiance with chasing batteries lead me to offer them.
https://www.automags.org/forums/showt...-SFL-Batteries
As far as boards are concerned there arent any out there. Only thing you can do is morlock it (try finding those) or contact p8ntbal4me
https://www.automags.org/forums/showt...ag-X-Mag-board!!!!!!
With those two unknowns I would make sure your offer is low enough to be able to part it out and still make some.
Keep in mind a charger is around gonna cost you somehere between 60-80 depending on whats available at the time.