Israel was paying something like $65/dose, which is way, way ahead of what other nations were going to pay. Bibi's career at this point was up against a wall,

Israel was paying something like $65/dose, which is way, way ahead of what other nations were going to pay. Bibi's career at this point was up against a wall, and he was willing to do anything to 'be first'. Israel has a cagey foreign policy apparatus, I have no doubt they went 'all in' on this, calling in favours, applying pressure in addition to the regular negotiations.