• Mattering Press ask 6000 British Pounds from authors, books are charged to print, free to download https://www.matteringpress.org/about/funding-model-and-fees
• ETC Press has a similar method but editors/authors are not asked to pay (royalties are shared) https://press.etc.cmu.edu/index.php/for-authors/frequently-asked-questions/
• Open Humanities Press http://www.openhumanitiespress.org/books/series/ does not charge author fees.
• Punctum Books https://punctumbooks.com/submit/ don’t have traditional book publishing charges but ask for funding if your grant etc has such capability, say $3,000-5,000 USD or €2,772-€4,620 ($5,230- $8,800 AUD). NB: “…our preferred procedure for the submission of completed manuscripts is for authors to send those to us any time between May 1 and July 31 of each year.”
• Amsterdam University Press can provide open access from €6,950 ($13,060 AUD).
• White Rose University Press offers open access books, at a charge to the author for an 80,000-word book, starting from 6,000 pounds (€6,710) (from $11,270 AUD).
• Ubiquity Press charge £3,650 for a 30,000-word book to £4,600 for 100,000-word books (from $6,860 AUD) and more for copy editing and indexing.
• Bloomsbury: £6,500 (€7,300 Euro, $12,210 AUD) for books with less than 70,000 words.
• Compare the above with Springer or Routledge. Routledge also offers preprint on own site, 18 months after on academic etc while Springer offers 10% of preprint.
• NB there is also ARC Humanities but I don’t see their book publishing charges listed. Green Access is: full PDF on own site, preprint on academia etc

NB Ubiquity Press lists some handy links for funds for open access book publishing.