http://jogos.uol.com.br/ultimas-noticias/2013/10/15/por-r-200-knack-para-ps4-aparece-a-venda-na-psn-brasil.htm
Acording to this website, Knack is avaliable for pre-order on the brazilian PSN, for R$200 (USD 85).
If you pre-order the PS4 (avaliable at october 25 for pre-orders in Brazil), you get the digital version of KNACK for free.
Not bad at all.
Althought, there is no oficial price in Brazil for the PS4 (the price reveal is due to october, 24th) and, in Brazil, a pre-order means paying the FULL PRICE in advance, not only a little bit of cash to show good faith.