How to get Conan O'Brien or Saturday Night Live SNL NBC tickets?

I am interested in 2 tickets for Conan O'Brien on 1/18/08 and Saturday Night Live SNL on 1/19/08 both NBC live tapings. I already know about the ticket lotteries and stand by ticket information available widely on the internet. I am interested in somebody that has the tickets but is willing to part with them. I am not wealthy.