I didn't say only, you did. 5000 is considered a bestseller in NZ. You can not be a NZer, anyone living here knows there are not 4 million households in NZ. The babies or children would not buy one, nor the illiterate, nor the prison population who can not get to the bookshop, nor the hospital population, nor the rest home inhabitants, nor someone else in a household where there is a book already.