FL House Flipping Leads... Am I On The Right track???

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So i got a list of lis pendens in FL... my plan is to door knock these and feel them out if they need a solution to sell their house as-is for cash.  

From my understanding lis Pendens could be one of these: 

1. hoa fees not paid-crap n/a
2. contractors for work done on house and not paid-N/a
3. property taxes-could be good indicator?
4. IRS - Could be good indicator?
5. Electric company - N/A
6. claims of ownership from prior transactions. 
7. Mortgage. Definite good indicator?

Before I was leaving yellow letters on ugly houses... (Seems not as well targeted as Lis pendens) - So far 1 decent lead but 4 misfires... people just calling saying they have no interest in selling.

Please let me know if I'm on right track to motivated sellers, thank you BP folks!!!