I published my first ‘book’ using Amazon’s KDP platform.  It’s a very short piece of work – more of a tongue-in-cheek effort than anything else but the lowest price I could list it for was £0.99.  If you have Kindle Unlimited and fancy a look then you can check it out for nothing at all – I would recommend that as opposed to buying as it really isn’t worth it but I listed it to try and drive me to write more worthwhile projects.