Guys - I don't know the owner of these cars, but I found a little bit of info on his situation.
The Treasury auction states that the government took ownership of these cars on in January 2021. The case cited in the auction is public, and was a case to enforce a tax lein.
Here's what we can tell from this filing. The owner has been through some form of examination process, probably a complete IRS exam, and through the IRS administrative procedures available after an exam in completed (appeals, mediation, etc.). As a result of that process, the government obtained a lein for unpaid taxes. Audits usually occur at least a year after the filing of a tax return, and usually, in situations where there is a lot of money at stake and a disagreement, take a year or more to complete. And when an exam concludes without agreement, collection usually takes months thereafter before they get into court filings. As to the cars, IRS began the enforcement action to obtain title and sell the cars on June 4, 2018. Working backwards, it is likely that this guy has been fighting with the IRS since at least 2015 for activity that occurred in 2014 or earlier. Needless to say, the IRS gets more and more difficult the deeper into this process you go.
So, the IRS conducted an audit, concluded taxes were due, attempted to collect those taxes through administrative means, and in June, 2018, dragged this guy into court. The court case was concluded in favor of the government on December 4, 2020, and because of that, the government became the owner of the property listed in the auction on Jaunary 3, 2021. There is probably a similar case out there for the warehouse (unrelated to storage costs, but rather related to the same unpaid tax debt).
Whereas the owner of these cars may well be trying to stop the auction of this property, he's really deep into a hole here. After all these procedures, making this problem go away would be very expensive. He would not only need to pay the amount of the tax lein, but there will be penalties which continue to accrue while the lein is unpaid, and court costs for the various court cases. Hate to say it, but it is likely this auction will go forward.