gm v6 turbo

I came across a gm v6 turbo for $500. Here is what the add said!

      "i have a rebuilt 3.8l turbo v6
       full chrome wrap around exhaust
       block # c112
       turbo 350 trans
       stage 2 shift kit
       2000 stall torke converter
       setup for four wheel drive, but have setup for 2 wheel drive.
       this motor and trans is 100% ready to use."

Does this sound like a good investment, considering that the eng. & trans. have been pulled! What questions could I ask to find this out. Thanks