Please help me find these people who are MIA (missing in action)

[Nat C.]

I have invested a ton of time into Driving for Dollars . 

Out of 42 abandoned properties I located, I tracked down 25 owners. I then either called or personally visited those people. I received negative responses on all of these for various reasons (not interested in selling, in probate, property was recently sold etc).

I have another 17 leads but I cannot find these people. I have tried asking neighbors, yellow pages, looking through court documents for an alternative address, google, facebook and intelius.

I really don't want to spend a lot of money looking for each person as the likelihood is I will receive a negative response. I know of findtheseller which charges $25 per search and skiptrace services which are equally as pricey. 

I am so hoping for recommendations from people who have had success with a website or service that are reasonably priced.

Thank you