They have a facebook group, I think it is called Akron Real Estate Connectors or something like that.

Put it on the most popular websites like Zillow, Zumper, apartments.com, facebook, etc.

Either ask friends and neighbors, are better yet, go on your community Facebook page and ask the question there.

@Jack Smith Check out the Facebook page 'Southwest Florida Real Estate Investor Network' for any questions and other local meetups.

Try Facebook groups in your area

You can find some to call on Facebook, Craigslist, Home Depot, etc.

Hi Dirk,What I've done in new markets I've invested in is join the local facebook community group pages and post about my needs - ISO of plumber, electrician, handyman, etc.

Join some local Facebook groups for hosts, and some local FB groups just for local residents. 

65% of your success is the list, not the letter.I totally disagree with Jonathan about saying you will not lowball.You will, and then you look stupid.Unless you are a realtor and can offer listing solutions, I would say you will NOT pay full retail so you don't get all the calls of worthless leads that want full retail.The only reason to do this is if you are a rookie and want practice talking to people.Easier and cheaper practice is to go to craigslist or facebook marketplace and call landlords that are renting and ask them to buy.Your letter is fine, if you find a motivated seller, they will call.

If you are in the actual SubTo community, there is no way they haven't been spam calling you and grouping you so you should have access to that inside of the Facebook page or paid groups.But, seconding @John Clark, if you are new as an investor, choosing SubTo is going to cost you a lot and get you a little.