Forgive me for asking, but do you have any experience with publishing? Agents don't have 100% success rates. Those who don't have agendas accept books they think might sell and reject books they're sure they can't. That shouldn't seem hard to understand or at all implausible.

Have you seen the list that Rachel is commenting on?

http://tanuki-green.livejournal.com/329393.html

It would seem to be proof that you can sell gay YA fantasy & SF. What agent wouldn't want someone with the potential for success like Holly Black's?