Every batch usually has one or two that linger - it's just the highly desirable/easy to pick up canon ones that tend to get snapped up. If you just want *any* pinch hit at all it's not hard. I'm not shocked those three are lingering, none of those are the kind of canons that the regular pinch hitters go for and they don't look particularly easy to grab/review either.

(If y'all want to get them grabbed feel free to do the "here's where to get canon for free, here's what you need to review for the prompt” research and post it here - it worked for that fantasy novel yesterday)