Its changed some, I used to tell people to look for the "we buy houses" ads, but these days the vast majority of the ads are wholesalers. Still a good place to start. Your local REIA is a good place to be. Its a relationship business, the more people you know the better.
I get several calls a month from my website of people building their list, they're all more or less reading the same script that says "I get several houses a week at discounted prices" which, of course, I know is BS and I never hear from them again. I can tell when a seminar comes through because I get the same phone call from 10 people in a week. Know how many of those have ever approached me with a house? Pretty much zero. I humor them if I'm in my car because I remember what it was like starting out, but most of the time I give them everything they need and they want to keep me on the phone asking how many bedrooms I'm looking for when I've already told them I don't care because they're reading a script and I did a pattern interrupt they can't deal with. Don't be that guy. You really just want to know if they are buy and hold or rehabber and ask what numbers they buy at and get off the phone, send a follow up email or whatever, but nothing you are going to say before you have a deal is going to matter to a real buyer. Buy and hold guys generally want 3/2 or better, some care about age, most don't. Those guys generally don't buy in volume. They'll pay more for the house, but don't want full blown rehabs. Rehabbers (like me) usually want to buy at 70% less repairs or better and don't care about what they're buying as long as they know they can sell it when they're done. The real players buy lots of houses, I'm looking to do 20+ this year and only that few because I'm having trouble finding ones that fit my numbers.
Deals are harder to find than people to buy them right now. That's not always the case, just the way the market is at this time. I'm a pretty firm believer that if the deal is right the money is always there.
If it were me, I'd find a handful of real buyers and network with some other wholesalers who can help you unload things and then really focus on finding deals.