The property with mortgage on it, the lender will likely pay the tax before let it go to auction.

The essence of this strategy is to show up in as many auctions as you can on quality driven keywords, so we're talking about those bottom of the funnel keywords like "sell my house fast " or "cash home buyers near me" etc.

If you are looking for distressed properties, check the auctions.

If you read my post https://www.biggerpockets.com/forums/223/topics/539116-second-flip-sold-and-bought-3-houses-in-a-single-day this is one of the places that I bought at the auction.

Is there a service that will provide a list of homes going up for auction in any given county? 

I am interested to hear your experience with buying a property on an auction site.  

This was a tax deeded land auction .... which from what I understand is pretty rare in Arizona. 

I’m not sure if this matters in your state, but check to make sure the correct name is announced at the auction for the owner. 

Read the past posts on the subject then ask any questions you have.Talk to your local county where tax auctions are held for info.Attend an auction, get a feel for it.

You can add all those costs onto what you're owed, and with those numbers you should get bidders and get paid off from the auction.