I tried it because I got a few of them in a surplus-sale packaged deal.

There seems to be an element missing here.

Many states sell their tax certificates and tax sale properties to blocks of investors and these investors never get to see the properties that are packaged by the state city or municipalities.

If I ever decide to sell, I’ll package this condo with some others for another investor so it can be easily financed, and as an updated unit it should bring $25k or greater, a pretty good ROI on the initial $10k investment.

Realquest Express Silver package is $49/month.

As far as content or packaging of your letter, anything you can do to stand apart from other direct mail people will help your response.  

Others will step it up a notch and provide a "complete package" and really act as a trusted advisor for your business.

Understanding title is an essential element of real estate investing.

Now you have a property generating income for you... now what.... now you put the property back up for sale but now you have a new marketing package... now you are selling a Rental property that already has a tenant living there and already has a property manager managing it... a passive investment... 

When I look at these some of the elements like furniture style cabinets will stand the test of time.