If it is a specific list of home owners within an area(s), then I would rather create a personalized postcard campaign raising their pain points and you providing them benefits and credibility so prospect will call you.  

Otherwise if they want you to marke the prices up don't do it because it could make you look bad.Additionally, you can subscribe to a FSBO service and call them as well as FRBO's and Expired listings.

I have since had a new tenant moved in and never call me for anything.

I may let them receive the letter first and then follow up with a phone call afterward.

A couple of ideas we've been brainstorming:Postcards shaped differently, maybe in the shape of a houseBig text offering to make a $1 donation to charity for calling our number just to let us know who their current management company isHandwritten lettersPlease share any innovative ideas you may have to grab owner's attention for mailers or ways that have been successful for you in the past. 

I am still calling around in FL and CA to find the best terms and rate.

Be aware that if you can fog a mirror you can get your general contractors license, and I get 2-3 calls a week from investors who got taken advantage of by bad property managers and contractors...

So many so called GURU's do even take time out their day to personally answer questions and instead sell their programs for thousands of dollars by flooding your inbox with so my emails.

And I am also a member of HAPCO where there is a newsletter advertiser called Dominic's Appliances in South Philadelphia.

Then, you can just call them, no waiting for a mailer to reach them and hoping they call you back.When cold calling absentee owners from driving for dollars, I think what you have so far is fine.