Yes, I can locate prospective buyer broker clients. The catch, of course, is that brokers were doing all these things before the Internet and they're still doing them off the Internet today. So the question is not about getting business. It's about making money.
Savvy brokers have no trouble getting listings.
But listings are not a sure source of profits because you only get a fee if the property sells. No broker sells every listing, and if you get enough properties that don't sell or which represent big marketing costs you can list yourself into bankruptcy. Buyer brokers have similar concerns. Every hour spent with a client who doesn't close means less income for the broker. All of which gets us back to the Internet.