"Best" is quite subjective...
Most expensive is my Desert Ghost male:
My most expensive combo snake is my perfect stripe Super Stripe. Here she is locked with the above Desert Ghost:
You will find that a good sized group of us buy the best example we can find (in our opinion) of whatever given morph/combo, so we have many "Best" examples in our racks. Going back to a earlier, long drawn out conversation, if you do not look at any given snake in your rack as the best of whatever it is, they why did you buy it?
I personally would be happy to post any snake in my collection in a thread like this.