It went from a rundown home and outdated in every aspect to an up to date property that I rented for 2 and a half years then sold What was the outcome?

If you try to use a 3rd party service, you may find that their information old, outdated, inaccurate, missing, etc.Here’s a quick way to search for a county’s tax lien auction information on Google:“<enter county name> in <enter name of state> tax lien (sales, auction)”Just insert the name of the county and state.

Too many investors waste time chasing bad deals, overpaying, or relying on outdated strategies. 

You can pick whatever close out date you want.

I do think some of your points are outdated though.

I have observed the older appraisers often have a outdated view of values especially in recently appreciating communities. 

Specifically im pulling data on SFH\MF and lots owned for 10+ years, with 35%+ equity in T4,T5,T6 zoned areas with 5k-40k sf lots, especially if they are run down or outdated. 

And like all the gurus, (Childress, Dave Galegor, Cantwell and the list goes on)...they pitch their seminars and courses; charge ridiculous amounts of money for outdated or information one can obtain for free with just a little bit of effort.

It's a lot easier to make money guruing tired, outdated methods than it is to find deals these days.

The property is funky old place, it is not the best, but fine for now, I would need to start planning for some potential pricier repairs in next 5 years or so with some of the major parts of the house (foundation, electrical is surely outdated, would want to someday install better HVAC instead of the boiler and no A/C setup it has, possible plumbing issues, roof will need attention w/in 5-10 years, etc).