Notice Amazon’s offer - $33.99.
When you click “11 new from $18.87” this pops up.
This was unexpected - Amazon is selling in New condition for $18.87, as well as $33.99. If a 3p seller did this we would have one of our listings suppressed, because it would be classified as “page hogging.”
After going looking in my shopping cart these two books are different isbns.
I think this is a bug, @SEAmod