People keep saying trump wasn’t prevented from selling for 6 months, and I have no idea why.

So, yes, he’s currently subject to a lockup agreement. But, the board can always waive that agreement, and given the board is made up of Trump acolytes, there’s no reason to take it too seriously (yes, if they did that, it could be subject to a shareholder lawsuit if a sale resulted in a plunge in the share price, based on the claim that the board was failing in its fiduciary duty, but by the time any such trial made its way through the courts, it probably wouldn’t matter).