Be skeptical............unless you see tiny eggs and tiny fry as evidence..........and in their tanks, not some other "tank".
I've seen tiny imports, roughly 2 cm long being imported before.
Any breeder would show the parents and the eggs, then the hatching and then the fry and their development if............they in fact did breed it, come on........they have a digital camera and they KNOW folks will question them.
No one is just going to causally go, "oh yea, I breed them all the time, but no....I do not have detailed pics."
Think about it.
If they cough up good evidence, they okay.