@Joshua Harger and others on this post, just food for thought from someone who worked for a company averaging 100 purchases a year in the St. Louis area...
A few mentioned being on lists, which is a good idea to do, to see what is out there. However, anything that hits a list probably is not a deal me, you, or anyone else who commented on here would want. Why? Couple of reasons, that have already been mentioned. But I think the biggest driving factor right now, is the market. If you can get a property under contract at 70%, close and take title, and then list in the MLS or blast to your list, due to the low inventory, it will sell. Worst case scenario, the company that bought at 70% (or whatever percentage purchase price made sense), can back it into a rental.
So, if you don't want to acquire yourself directly from the seller, which is going to be one of the best ways to get deals, you are going to have to find and become the good wholesalers best friend. Just to give you an idea, the guys that run the companies buying 100+ homes a year, they are calling wholesalers every week, asking them what they have. They want to get ahead of the email blast. They want to offer on every thing they are working on or have under contract. And if they are lower than asking, a good wholesaler can go back and negotiate. I'm not a fan of it, and have never done it, but sometimes it is the case. Some might be saying, why as a wholesaler go back and negotiate? Well, the bigger companies have proven that they really are buyers.
Many say they want the real deals from the wholesalers, but how many of them have actually bought homes or multi? How many have bought multiple homes / multi's a month? You start to really see who is for real and who is pretending.
Which is why a lot of deals are never seen in email blasts, because they are going to the real buyers. My old boss had it a part of his weekly agenda to take out 2 wholesalers every week. And he did it. Out of 100 homes, do you know how many came from other wholesalers? Somewhere between 60-70%. The remaining was direct mail, SEO, yellow pages, and miscellaneous referrals.
Outside of that, my only other two cents...I'm baffled if you want north county / rentals, north city, etc, you don't need wholesalers. There are plenty of deals on the MLS. I laugh when someone puts out a north city "deal." I have a buyer who consistently buys in 63115. I am getting to know it pretty well. We've averaged buying property at 8-15k a door. And "wholesalers" put out these deals higher or same price as what is on the MLS! You can throw a rock and find deals in north city. Not most people's cup of tea, just as an example.
Now, if you want a rehab in retail markets, you will not find that on the MLS. Foreclosures are going to owner occupants before it's open to investors, or they get bid up.
No matter what route you go, you've got to creative, and the tried and true old school methods still work.