Gone with the Wind Lamps & Ewer

I have 1 hand painted GWTW lamp (converted to electric) top and bottom globes. No chips or scratches. 1 hand painted GWTW lamp (converted to electric) bottom globe with oil lamp cover. No chips or scratches. Also I have the matching hand painted GWTW Ewer. (Just recently found out what that was)
I do know that all 3 where purchased together, by my mother, 20 years ago at an estate sale. Does anyone know if these were ment to be a set? Are they worth more as the set?
While researching GWTW lamps I have seen a huge differnce in the prices!! Does anyone know which end mine would go for? High End or Low End.
Thanks