BTW, I noticed certain older editions of the DP Guide(s) are going for over $100 on Amazon.
Being offered for X= going for.
Amazon is full of people listing outrageously over-priced goods, for the simple reason that it costs nothing at all to do so - and there's a fleeting chance that some mug might actually pay.
"The last time a nation did what a bush told them to do, they ended up wandering 40 years in the wilderness ... " - Anonymous