Nobody can know what, if any, magazine ban will look like.
As far as talk, which is very cheap, the one thing that seems to be different this time around from last is that there may be a prohibition on the transfer of "pre-ban" mags...if they are grandfathered in somehow.
In a naked act of profiteering, I sold all my 30s for a great deal of money to somebody who seemed more than happy to purchase them at that price. I have a whole bunch of 20s which I kept...but would do same at even more outrageous prices if a ban becomes imminent.