That is a horrible first picture, but from the first pic I would not buy that snake at all. Are all 3 pics the same snake?
I am in the boat that true high quality Pastels are fairly uncommon on the market. I think that they are kept back, or sold before they get to KS or Fauna. Also, few folks have bothered to line breed their Pastels, and many are just overflow from other projects. And some folks hide a poor Pastel by putting it with another morph, and the Pastel offspring are nothing to write home about.
If you want a Pastel I suggest looking for one at least 300g. This will allow you to see how the color is working out. You may pay a bit more for the larger snake, but you will get a better product in the end. You can also ask for pics of the parents, and that can give an indication, but even great Pastels can throw ugly ones (but not so much the other way around). Also, you can got to a show (if they have them in your area) and pick one out in person.
I get you are excited to get a BP, but I truly think you will be happier in the end when you get the best example you can find. If Pastel is the morph you have chosen, I would wait a month or so and you will se MANY more on the market, and you may be able to snag a fantastic one.
Also, investigate the different lines, as they have their benefits and drawbacks as well. Ask yourself what YOU are looking for in a great Pastel and go after that.
There is a reason that I do not own a straight Pastel, I have yet to see one that I would buy, that was available. All the great ones are NFS....
Sorry for the novel, but it addresses issues I see come up a lot on here.