I'm saying they are like a lot of "techs". They look in a book for the answer and whatever the book says is the way it is.
I'll bet they would charge over 6k for new standard Bravo 1 drive as well when they are available all over for around 4k. The "book" will list that as retail price.
There are some differences from early Bravos to newer ones, and the newer X, XZ, and XR. But the bottom line is all of them can be run in either direction.