Aside from going after E and O insurance and a formal complaint with the broker and real estate board, this is also good advice and another avenue to pursue.

The deed of sale is to be signed at the end of the year as the seller won't be able to sell it legally beforehand as it bought it at a judicial auction and the judge order will come in November.The price agreed is €450K, that is less than €3K/sq. meter.

I would keep things formal like that with him unless you get married because things can go SERIOUSLY sideways.

Seller agents have an obligation "fiduciary" to their clients so they will have to show the home to unrepresented buyers, if agents want to try and cut the independent buyer out then they risk the buyer lodging formal complaints.

There is no appellate or statutory authority that allows to you cut the timber after the tax deed date, but while judicial redemption rights might still be outstanding.

There aren't any legal hoops to add to the amount owed in a non judicial foreclosure as their fees are set.

In the case of abandonment without something in writing, I typically recommend my clients go through the formal eviction process, especially when ANY personal property left behind.

The problem with loans and judicial states is that if they have to go to foreclosure, it can take years and a lot of money in court to take control of the property.

Are you going to hire someone to make sure the corporate formalities are upheld?  

If it was a non-judicial state, did you file a TRO or something?