Check out these numbers from the Federal Election Commission
Candidate Amount spent Votes $/vote
Barack Obama (D) $513,557,218 69,498,215 $7.39
John McCain (R) $346,666,422 59,948,240 $5.78
Ralph Nader (I) $4,187,628 738,720 $5.67
Bob Barr (L) $1,345,202 523,713 $2.57
Chuck Baldwin (C) $234,309 199,437 $1.17
Cynthia McKinney (G) $238,968 161,680 $1.48
Total $866,229,747 131,070,005 $6.60
If you still care enough to vote, and you still think you're accomplishing something, you're better off donating $20.
To the next person who tells me I'm part of the problem because I didn't vote, I donated $200 in that election, so I did exponentially more than you did by voting.
I'll never vote again.