First thing is that a non-visual het only applies to recessive genes. You can not breed a pastel to a normal and get a normal het for pastel. Any visual super recessive animal will produce offspring that are 100% het.

The more you do it, the easier it gets to understand. But, I have seen a lot of 50% hets sell for normal pricing, and I'm sure there are some that are just sold as normals. That's a lot of work to prove out something that may or may not carry the trait you are looking for. On the other side, it's an inexpensive way to try and get the morph you want.