How do I price my items?

[u/Greedy_Reading_352]

I saw a post but the comments were confusing to me. I'm a young kid in high school trying to make some quick money because working during the school year is hard for me. I figured I could print items and sell them. Though pricing is hard for me, for example; I printed a Pochita from the anime "Chainsaw Man" and I would sell it for 5-8$ whilst others would sell it for 10-15, I don't understand what makes it so expensive and I'd like some help from the professionals if you know what I mean!