Do all Bbags come in boxes? Did yours?

The last bag I bought from Bal NY in the spring only came in a dust bag no b'box just a plain shipping box without much stuffing, earlier the others all were double boxed. All the bags I've bought fro NM or BNY were only in dust bags but AR sent them in b'boxes.
 
I have 3 brand new BBag. The Mini Classique I bought from Paris and Argent First from AR came with box. However, no box for the MU. Wonder Why:confused1:

I didn't know we shouldn't put bags in boxes, thanks for letting me know. I was trying my luck on *bay to get a box for the pre-loved Violet First :shame: