Unfortunately, I don't know of any development area nearby where property was sold via a bidding process. But I would really like to check it out sometime to see who builds what there.
My city only does it that way now and, according to reports, recently broke the 1000€/m² mark with it.
In front of the children's school, there used to be another DDR slab-block school, which was demolished and the plot divided into eight building plots. All were awarded via the bidding process.
The first four plots already bordered an official street and came onto the market earlier. Four private individuals received the contracts there and each built a single-family home.
For the other four plots, a street first had to be designated, so they came onto the market about two years later. Prices had meanwhile risen significantly. On one of the four plots stands a very high-class single-family home, where everything was pristine from the start (very large, great outdoor facilities, two SUVs with the star emblem in front of the door).
The other three plots were snapped up by a developer who is rather notorious here for quality issues. He built a semi-detached house on each, 150m² per half, and sold each for about 400k€. None of these homeowners need a lawnmower; the plot consists only of the house and a 3m clearance strip.