If she is one of them collies that chase car tires and is hyper, then no, as a lot can be neurotic!
Temperament, stamina ect, good working ability, play a big part.
Some collies have eye defects as well, another thing to look out for.
This collie below, is here in ireland, doing very well and thinks for him self ect, some may think his not right, but he is not far from what i would use..