Has a FIBA World Cup game ever ended 87-70?
Exactly once. On December 3, 2018, Germany beat Estonia 87-70, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 87-70 in league history.
That makes 87-70 the 475th most common final score out of 1,178 that have ever occurred in FIBA World Cup. One point away, 88-70 has happened 3 times and 87-71 has happened 4 times.