Regardless of outcome of the suit, the BATFE has achieved its goal to first, harm the industry, and second, to make gun owners off balance if they are trying to stay legal. Like the bump stock rules, where the stock went from legal to illegal, even though it in no way alters the function of the firearm itself (semi-automatic actions remain semi-automatic, they are just fired more efficiently).
This, along with State Laws, creates a cloud of uncertainty, and those wanting to be free from worry about what will be banned next (and not wanting to invest in something they would legally be required to surrender with the next edict), will cause markets for firearms being targeted by the press and special interest anti-gun groups to slacken. Perhaps. The effect could be just the opposite.
But whatever you do, don't use your credit/debit card, buy with cash while that is still an option.