It's not a mystery. All tech stocks, including Twitter and Tesla, have teamed after Elon's offer. So now he doesn't want to buy it at all, or not for this price. So he is trying to find an excuse.

Very likely he's looking for a discount.

Maybe, I think he doesn't want to buy at all. With TSLA down almost 50% since he proposed to buy it based on loans against his stocks it would be very expensive for him at any price now.

But I mean who knows, your guess is as good as mine. I think it was an impulse buy and now he has regrets.

He doesn't have loans against his Tesla stock anymore. He replaced those.

So, does he not want to buy, or not under current market conditions? :)

On what grounds would Twitter possibly offer a discount? He made an offer, filed with the SEC, and they accepted. As far as I understand he's currently contractually obligated to go through with it.

For example, to avoid protracted litigation. Last year, Tiffany aggreed to a slightly lower purchase price as well.