This is a graphic from the BiggerPockets Flipping Houses book:

When I got over there (well I’m not going to be graphic) I was sure he was dead.

Who doesn't look cute in STRIPES!

The only thing I might add, production-wise, is to maybe add a little graphic - i.e. an arrow or maybe highlight the area instead - to point out exactly what you were talking about with the sagging and the joist issue.

I am a graphic designer by trade so I am picky but by any standards, my postcard was terribly smudged.

Also, you don't have to worry about whether they are going to open your letter or not.I think click2mail is ok, and cheap if you are strictly using text and no graphics.

This includes the initial phone call, driving out and meeting the owner at their house, follow-up until I have signed contract back, and the BS associated with title problems, seller's getting cold feet and trying to back out of contracts, and all the other stuff that comes up from contract signing to actually settling on the house.BEST PERFORMING MAIL PIECE:Handwritten letter on yellow lined paper with handwritten invitation (A6) sized envelope in random colors (pink, light blue, yellow, etc)I have graphics on BOTH the letter and the envelope- things like dollar signs, stars, arrows, houses, etc- whatever random stuff I could think of to make the letter more eye catching and 'WTF' eliciting when opened by the homeowner, so they would actually read it.SECOND BEST PERFORMING MAIL PIECE:5.5 x 11 inch yellow post card (big post card) with somewhat handwritten looking font.  

We found a cute duplex, and in my name only (my husband has a foreclosure on his credit) making $50k for a job that was about to end (but I didn't tell them that!)

Here's an example of a vendor who provides free graphic design services for each letter, I've never used them, but if you Google snappack you'll find tons of companies like this one:http://www.snappackmailproduction.com/In my experience when we did our pilot program a couple of years ago we saw response rates to mail triple.

If you need any help with branding your company, I know a wonderful graphic and web design firm.