Curious about Tax foreclosures in Johnson County

[Jandle Johnson]

I am brand new to investing and currently researching various strategies.  I just recently learned about investing in tax liens and began some research to find that Kansas doesn't do tax liens, it just forecloses once a redemption period is up and auctions the house.  Many don't sell and then seem to be available for purchase from the county for the amount of the taxes, interest, and county costs.  Anyone purchase property this way and what was your experience and or advice?  It seems, on paper, to be a cheaper option than looking at a mortgage foreclosure.