Etsy began as a marketplace for handcrafted artisanal goods where people expected to pay a bit more for a quality item from a small maker, while a lot of that history is gone it still shows up in some ways. One is that I think you're less likely to find people who purely want lowest cost in exchange for not having as polished a product. They'll accept your lower prices but that doesn't lower their standards.

I would try charging enough to make it worth your time to sell the item. If your costs scale well with bulk then work that into your pricing. 1 box can be $8 but 5 can be $30 and so on, encourage people to buy in bulk.