Hi scflock,
My personal opinion is that TSC sells so many chicks because they have everything you need right there. Many feed stores don't have heat lamps or some of the informational literature, medicines, etc. that TSC does.
I've never bought a chick from TSC. They gave me one...
LOL! I don't have a rooster and I collect eggs every day! That's what I would have told him. Then, I would have asked if he was just trying to sell me an extra chick, or if he REALLY did not know that a rooster isn't needed for eggs?
You would be amazed. There are very educated people...