Where at in Tx? I live in N.Tx.
I wouldn't band the Grey if not already banded. Definitely get the information/paperwork WHILE getting the bird. We have on two occasions been promised paperwork after funds were exchanged and never received anything. One was through a 'rescue' and they flat out lied to us. The second was from the 'breeder' which I'm now led to believe she wasn't really the breeder. If you're contacting someone from the Dallas area, more specifically Mesquite or Forney, contact me privately and we'll see if you're dealing with the same person.
Your story sounds very similar to how we got our Caique. He's a great bird but I have nothing on his background, unbanded etc....