Just tell him it didn't work, but thanks anyway, haha..
Well done on finding a working card though.
I hope when you do get it working in games, etc, theres no pipe damage, etc, because some cards when damaged will still run in 2D fine, but won't when it comes to 3D.
Like today, I looked for broken 4870's in my area, and found one, but it did still work 2D, but he said that after a year or so of it being in his machine, it stopped working, and gave errors in 3D mode.
I just hope thats not going to be the case with it.