I don't want to be fussy and all, but even if it was sold for "just" 1.6 million dollars it would represent a big amount of money, and honestly I cannot read quietly that it could not be considered as a "never work again rich" amount of money.

It's the same as getting between 30 and 40 years of an experimented developer's average salary where I work, so it would mean that I can live exactly as I do now (and I can't complain), but at home without needing to work anymore. Just good money to spend with family, travelling or improving your knowledge. Seems like a good deal to me.