As a professional wholesaler with a very well established buyers list, I sell the majority of my deals with a handful of phone calls. There would be no point in listing most of them.
Now I have at different times listed wholesale deals on the MLS and what I've found is I hate it. I end up getting investors that whine like retail style buyers. They want this and that fixed or tested and 30 day closings and option periods and inspections and contingencies and blah, blah, blah.
With my own mini-mls, as you put it, Jerry Kisasonak, I dictate the terms.
I want you to close in a week or less.
There are NO contingencies. No financing addendums. No option periods.
I get the earnest money directly and it is non-refundable.
I pick the title agent.
If you want an inspection, do it before you bring me a contract.
I will fix nothing in the house.
I will not pick up the piles of trash in the front yard, or the piles of clothes in the kitchen, or kill the cockroaches infesting the house. I will not replace the roof, the sewer line, or the heating and air, and I will look at you like you are stupid if you even ask me to. That is obviously why I'm selling it so cheap.
Here's the price. Take it or leave it. If you don't buy it, someone else will or I will fix it up myself. I don't really care which it is.
When I try to dictate these types of things with a realtor, they usually freak out and look at me like I am stupid.
Wholesaling professionally is about building strong relationships with strong cash buyers, and the MLS is not needed for that, and neither are realtors. Realtors usually get in the way and complicate things. And really, why waste the time or the money anyway? Just pick up the phone and call the investor directly. It saves precious time and makes you more money. Why pay a realtor thousands of dollars to wait to see your listing, research it enough to pass it on, set up an appointment, show it, write up a bloated contract, blah blah blah. Do the work yourself. Build the relationship with the investor directly and make thousands of dollars more on every transaction. That seems like a no-brainer to me.
Now when you are actively building your buyers list, I can see the advantage of doing any and every type of marketing to buyers that you can, including the MLS. But thinking that any one marketing strategy is the end all, golden path to riches and enlightenment, is really a short walk to a small bank account.
My best buyers rarely buy anything off of the MLS. If I was utilizling the MLS as my main marketing tool to buyers, my business would suck. Obviously each market is different, but my best advice is to consistently and persistently build and work multiple systems of finding deals and of finding buyers. Sure, use the MLS, along with everything else you can think of to find buyers (websites, squeeze pages, ads, networking, research, etc).