I've mailed a few letters but I'm not getting any traction with it.

No expense was spared as this home was only two blocks from the beach.

We made sure our gutters were always cleared and have leaf blocks over them.When it still continued, my contractors noticed that my neighbors gutters were blocked and that there was a 4" by 2" by 2"  hole behind the gutter where the wood or brick had disintegrated. 

Make your own letter or use a company like Open Letter Marketing to send those owners letters.

We just added a 2 bed 2 bath condo in Breckinridge. in the village two blocks to gondola.

Lots of people talk about direct mail campaigns and how they work when someone replies to a letter.2.

pPostcard or letter mailing lists?

I've most recently used Yellow Letter HQ.

We highly recommend going the extra mile and giving your appraiser a letter/description of the area/trends that your property is in detailing how you came to the number you arrived at regarding value.

I've sent out letters already but they can get expensive.