Tips on approaching an apartment complex owner

[Frank Costa]

Can anyone provide me with an example of an effective letter used to approach an owner of a 6-8 door garden style apartment complex? The property is not currently on the market but I'm very interested in planting the seed to see if there's any interest in selling. Other than the basics of introducing myself and presenting the intent, is there anything else you would include to gain the desired attention?

Thanks, Frank