BUFLO3

In English: Buffalo Three

This is the perfect example of the license plate rule- 

"There is no reason to get a vanity plate, but if you do, it should immediately decipherable and understandable."

They own three buffalos?  Maybe this guy produced the Nenah Cherry song 'Buffalo Stance' and this mini van is the third car he's been able to buy off the royalties?  Your guess is as good as mine.

SCTRSAL

In English:  UNCLEAR

Theories include 'Scooter Sal' or 'Scooters All'.  Both are stupid.  [EDIT- 'Scat Resale' has also been suggested.  I love the idea that this BMW owner made their fortune in dung.]

Food for thought: If your vanity license plate is difficult to decipher, maybe it REALLY shouldn't exist.  Conclusion:  Scooter Sal is an IDT.