How much to bid on Post 3rd sale liens?

[Sam Tright]

Saint Louis MO has a large list of Post 3rd sales. A local lawyer did a video on the process and mentioned a good starting bid is the full amount of taxes owed, but not interest and penalties.

Do you guys agree with this? I would of course like to bid at an even lower amount, for a partial payoff. These are Post 3rds after all. On the other hand maybe they have a floor amount to consider.