If you want to purchase tax sale properties, whether tax liens or tax deeds, one of the best options is to buy it directly from the homeowner. This is a win-win situation for you and the other parties involved. The homeowner gets out of the mortgage without damaging his credit rating. The lender saves time and expenses that are related to the tax sale property. You as the buyer get an affordable property at far less than its real market value.
Another option is to purchase tax delinquent properties directly from the banks. You would be assured of getting a clear title deed of the property. Usually, the bank would appoint a trustee to handle the property sale. Talk to the trustee to get each detail on the property, and the minimum bid that the bank would accept.