That's pretty awesome and a LOT of cash upfront, but if even it there had been only a small fraction in working order then ~$7/each is a steal for sure. $60/each seems like a bit of a stiff hike to me, considering the base margin (ignoring time/battery cost).
basic approximation: $7 each IN = $700 > $60 each OUT = $6000 Of course it's easier to omit shipping, packing, and other costs.