You have to ask? Hillary’s people would probably throw the fireworks into the nearest lake before they sold them to Donald. That’s how zealots are. Their version of the Boston Tea Party (in their minds).
Who knows. This might have been a public remark in order to emphasize the point that he’s not intending to overspend as president. Not really in earnest (he could have easily been magnanimous by offering to buy her out at face value). They could be re-wholesaled, I believe, for far better than that. Maybe some obscenely rich Rat would buy them just to have the very fireworks that Hillary was going to shoot off.