I've been watching this thread all day. You both have valid points and both have things that havent been really proven.
Matt claims the snake wasnt sick, but she was in a plane in most likely feezing temps. for who knows how long. That could explain the URI or LRI whichever it may be, its totally possible that the snake got sick from the plane ride.

Things still in question. The mites and that trevor showed off the snake as if nothing was wrong.

Its easy to be over dramatic and say there's 200-300 mites on the snake, Im not saying that its true or false that there were that many, just saying that he may be exaggerating the amount.

Where they came from. They may have been on the snake from the beginning and Matt shipped the snake anyway. Maybe it picked them up on the way. 200-300 is a bit much to pick up during an overnight trip but i would say it could be possible.

I do find it hard to believe that an experienced keeper, seller and someone who has mostly positive feedback of his sales, wouldn't put the snake in a snake bag, even though the method of packing was so poor.

This has become a big mess, i don't think everyone is being truthful with what they have said.

In the end it MIGHT be entirely Matt's fault that this all happened because of the poor packaging, if that's the case then he should make things right and refund the money.

Just my view on this situation