Odds of Getting In
Uh, did you even see the qualifications page? It is extremely difficult to become an FBI Special Agent.
Assuming you have the obscene amount of physical, mental, emotional, and age qualifications we've listed and are still set on becoming a bona fide Special Agent, the odds are still tough. The FBI employs roughly 36,000 people, but only just over a third of those employees—around 14,000—are Special Agents (source).
That may sound like a massive number, but consider two facts: over 21,000 people applied to become agents in 2010; and Special Agents often hold their positions for several decades. So yeah, it's a bit competitive.