No, it will not. All life that has been on it has probably dried up into dust. Depending on how much dead rock your neighbor has, I would buy it. The rock will be light and porus. This will berfect for using as base rock. I would then seed it with some new cured live rock. Wait a few months and algae, and small organisms will already be inhabiting the dead rock.
Sam Reef
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90 Gallon FOWLR Marine System
20 Gallon Reef
10 Gallon Reef
10 Gallon Marine Aquarium
20 Gallon Freshwater Planted Aquarium