What parts of this can be reused? I bet the engine is OK, but seems like the sides of the ... tube ... were pretty roughed up. I guess that's probably the cheapest part of the assembly though.
Everything except the stage connector ring (which uses pyro bolts I believe) should be directly reusable, after an inspection, light brushing, and refueling / recharging.
Maybe the bottom uses some ablative material, then a new coat of it needs to be applied / attached.
All the internals should have enough resource for likely dozens of launches, if Falcon-9 is any indication.
