I am a licensed agent & I write letters to people all the time. I write them for myself but also for my clients. I think the letter needs to be structured differently if you are writing it for yourself as a primary, or as a rental, or for a client. I specialize in finding my clients & myself off market properties & probably more than 50% of my business is off market. I usually start by doing extensive research if the property is very specific ie. in a specific neighborhood/specific sf/etc., then I create a spreadsheet that has all the addresses on them w/ the owners names, then I research each one individually-- tenant occupied? rental? primary residence? then I research the owners & check to see if there are any specific things that might cause them to sell such as new additions in their household which may cause the need for a larger house or if there are any unpaid taxes or code violations etc. (motivating factors)-- then I usually call first. If I am not able to reach them then I write them a HAND WRITTEN letter and I give them the exact reason as to why I am writing it. I write my letters on blank greeting cards & hand address the letters so when they receive it they typically open it because they think its an invitation or something fancy... See below for example:
Dear Mr. ____,
Thank you for taking the time to read my note. My name is Kamilla & I am writing you this letter because I was driving around ___(Specific neighborhood)___ I noticed you have a property located at ___(address)___. I have been looking for some time to purchase a property in their neighborhood & yours matches my criteria. I wanted to reach out to see if you would have any interest in selling it or if you would be interested in entertaining an offer? If so, please give me a call to discuss or feel free to send me an email at __(email address)___. Thanks so much, & I look forward to hearing from you! -Kamilla
I also attach my card w/ my picture on it & all my contact info so that they see that they are receiving the letter from an actual letter & that the letter is not being sent out in bulk or spammy. I get really really good responses with this. If they do not answer to my letter then I just knock on their door. :)