This is for a controlling stake, not outright ownership, isn't it?
While I think the purchase of Twitter was ultimately in his favor, he definitely had buyers remorse back then.
By sending the message that he wants to buy at 97B, he could imply that 260B is clearly exaggerated and create fear for these investors.
Hey Sam, I'll buy it for tree-fiddy, good luck getting anyone to invest at a bigger valuation now!
Edit: I love the edit, it's very straightforward now!