I agree with Nathan and West, from the pictures it looks like a normal to me. We could be wrong though.
There is definitely no Pastel as that also causes changes to the pattern aswel as the colour.
I’m going to guess that as the store had quite a few of them and they were $40 each, that they are just Normals. However, pet stores get their animals from whereever they can, so there is a chance (probably a big chance) that she is het for something… As to what, that is impossible to tell without a lot of breeding.
If you are certain there is something going on that the camera isnt picking up, try taking some pictures outside while the sun is up. Here is a guide that will help us help you… Guide in asking for Morph Identification Help