@Matt Tomco I send a lot of Direct Mail in my job and I have to say this is pretty good. Personally I find the color palette a bit heavy but you have used the colors well regardless.
The header and sub header and are in big clear copy and are easy to distinguish from one another.
The CTA (Call to Action) in this case is the Phone and website. You might want to look at adding some short copy to create a sense of urgency - but you know your list and business model, so maybe not necessary.
By law you only have to keep certain parts of the bank blank. I would encourage you to look into this and consider using the space if you can add additional value. e.g. you may look to provide a proof of credibility in some way, e.g. a small quote from a previous happy client of yours.
Or use the space to let your audience know your a local company specializing in the posted too area.
More than anything, what will determine your success is the quality of your list and how well the message on your postcard is tailored to your list. From your copy I would imagine you are going after highly motivated sellers who are looking to by pass an agent and close quick - if thats who your list is then you stand a good chance of success.
And of course make sure you have the systems in place to answer emails and website inquiries. And next time, try changing one element of the post card to test its impact. ABT - Always Be Testing. Be sure to sue the same list so you are just testing one variable at a time though.
On a side note, im not sure I get your tag line for your company. ''Do the Right thing always!''. Im assuming your trying to say your company does the right thing, but it almost sounds like a directive. Feel free to ignore this advice, maybe the rest of the community disagrees with me. But maybe something to consider.