Relationship of breeders

Okay I found a girl that is 2 hours away that has regular fancy rats that she will sell me for $3.50 a piece which is better than the $5 the other quoted.
But she has litters from two different females but the same male so I was curious would I have to find someone else with unrelated males or could I get males from her and just breed to opposite mom litters.
I am not sure how that all works so I wanted to run it past you guys so that I know what I am doing in this area also.

I hope you all don't mind all my many questions lately.
I just need to make sure I do this right.
thanks again and really really appreciate the help.
rhsm

What part of Fl are you in?

You would be fine breeding any of them, so long as she has not been inbreeding for generations already. I would suggest starting with as much variety as possible, but if it is a big pain, then don't worry too much about it. You can always pick up another male to give you some clean holdback litters.

I am in the Panhandle of Fl, in between Tallahassee and Pensacola basically.
Almost 2 hours from Pensacola and about an hour from Tallahassee.
thanks rhsm