Purchase subsequent Tax Liens with out waiting for the auction

[Russell Johnson]

I've noticed in the Maricopa county online tax lien map, some investors have purchased tax liens at auction. Then 4 months later they purchased subsequent delinquent tax liens on the same parcel without waiting for the auction in February.

I also have some tax liens that I want to purchase the subsequent lien on. I've called the auction firm and the county and the phone operators don't know how to buy the next lien until the next auction.

Do we have any tax lien pro's here who know how to do this in Maricopa County AZ?

I'm grateful,