Now, this is just my opinion.
If you are confident to send your demo to buyers for work, then you should be confident to send it to agents. If you are brilliant, you are brilliant! The buyers will want you, the agents will want you.
I find consistently, if an actor submits their demo to a slew of agents, and they get a call from one to take a meeting, they'll get a call from several. When you are good everyone wants you. In fact, in my 20 plus years of teaching, I've never seen this not be the case. When I hear a demo that is brilliant (which is rare), every time the actor gets multiple offers for representation. I've never seen it fail. And it isn't a coincidence. Be it an agent, ad exec, or casting director, if you are good they want you!!!!!
This said, I've seen mediocre demos get an offer for representation, too. But never multiple offers.
Just keep in mind that the getting of the agent is the hardest part of the journey. When I was starting out, there was no way to secure several agents from a variety of markets. But this is the norm today. In LA most agents won't consider you unless you live here. But that's OK! There's plenty of work throughout the country. You don't have to live/work here to make a living in
VO. That said, if what you want out of your career is network promos, animated films, etc., then you'd have to live here or NYC. Today. As technology advances, this too will probably change. Just like Voicebank has opened up commercial auditions to folks all over the US and Canada.
But back to my original comment. You should be as confident with your demo to agents as you are with buyers. And trust me, you DO want representation! It's the best way to get best opportunities!