Somebody local (by local, I mean in the same state) has an Opal hen for sale. For starters, they are asking $175 (surprising since they want $400 for a pair of whites). They don't have a cock to go with her and didn't say how old she is. Is that a fair price? And how can I tell that she is for sure an Opal? For cocks, I have a black shoulder dark pied, his silver pied son, and a midnight black shoulder. Would it be worthwhile to add this hen? And if I did, which cock would be best? Due to the distance, it would take me almost 6 hours total for driving time, and a little over a tank of gas for my truck (so about $75 for gas). Thoughts?