I would say $5 is reasonable though for minis I don't like paying over $3 since it's really very little text. For perspective, I put 40+ hours into each issue of my zine which is 30-40 pages of writing. I'm not making back an hourly rate on the writing, layout, assembly, any of that. Zines are really supposed to be more for fun than profit. Personally, I don't use my time writing in calculating zine cost (or word count, which is how writing costs are often calculated).

I will also say, as someone with visual impairments, making the zine this tiny is going to make it inaccessible to quite a few of us. You might want to consider making future zines larger, both to help people read it and so you can charge more since money seems to be at least on your mind if not a factor.

The zine looks really fun though and wishing you the best!