RE: FIB Buffalo's/SUV's at satellites:
I've been watching this thread for a while and decided to make an account to clear this thing up.
When I heard about the FIB at the satellites I went there a couple of times and no cigar.
I have since FINISHED the game and passed through on a strangers mission (Trevor driving someone from point A to B) and to my delight there it was, 1 buffalo and 1 SUV.
So, basically I'm confirming that:
A: They DO spawn there
B: They do not only spawn for people early on in the game, I have finished it and got one.
Hope that clears things up and prevents people from going backwards in the game.