I'd be interested in hearing some updated D4$ mapping methods also.

If you want the deals others MAY not be paying attention to, you need to search using methods that others aren't using.As far as using your agent, I would be careful about sending them on wild goose chases and offering on dozens of properties, of which most will not pan out.

The SF bay area these are actually a somewhat common method of selling individual units similar to a condo, but not requiring a subdivision like a true condo ownership.

Since you have an interest in multifamily units I added the below links along with the BRRRR method of acquiring properties.https://www.biggerpockets.com/renewsblog/2014/03/13/investing-multifamily-ben-leybovich/ (How to succeed in multifamily investing)https://www.biggerpockets.com/renewsblog/2013/04/09/how-to-buy-a-small-multifamily-property/ (How to buy a smail multifamily property)https://www.biggerpockets.com/renewsblog/2015/11/16/how-to-choose-areas-multifamily-deals/ (Choosing multi-family deals) https://www.biggerpockets.com/renewsblog/2015/09/30/bought-rehabbed-rented-refinanced-14-properties/ (BRRRR explained)To be more successful, you simply have to work on the other elements to progress your REI pursuit.

What marketing methods did you use?

Is there a method or process that I should be using besides comparable rentals based on sqft rooms/baths and immediate area? 

This will help make sure all the potential damage is addressed*. 2- Make sure you get complete documentation of whom treated and the warranties to include methods of treatment and pesticides used and a complete report from the contractor whom completed repairs including there NJ HIC lic #.* Now here is the flip side to be honest.

Hey Bp,Im stating my direct mailing campaign and i was wondering which method do you think is more effective putting together my mailing list by myself or using a company to compile the list for me.any suggestions would be greatly appreciatedthanks

Do you love fantasy football and have a distinct method to hedge your risks when choosing specific players at your draft?

The "do it yourself" method would be to search for similar properties on CraigsList or other listing sites.