Are the cacti floral print poly mailers you buy actually recyclable? Do your customers know where to turn them in? Did you check if their local county accepts poly recyclables? Do they know that the compostable mailer won’t decompose if it ends up in a plastic trash bag in a landfill?
Did you forget your reusable bags when you went to goodwill? Could you have carried your 5 items back to your car in your arms but took the single use bag anyway “because it’s only one”? Did you forget you could unload your items from the bins directly from your cart into your car? Or were you too lazy to do that?
Shopping second hand is a fantastic way to reduce waste/demand for fast fashion on a individual level, but the rise in e-commerce has greatly contributed to the increase in plastic waste - but it doesn’t have to. Poshmark has priority mail paper packaging options. You have the ability to purchase paper and compostable mailing for just cents more than polyurethane. You can provide instructions on how to properly dispose of packaging. As a consumer, you can leave a review stating whether or not you liked the product, and how you felt about the unnecessary plastic packaging (don’t get me started on the bagel bags, I will chew you the fuck out). You can bring reusable bags wherever you go, and refuse plastic and unload things directly from the cart if you need to. Let’s stop being lazy, or passive, or assuming your customer knows how to dispose of things responsibly. Let’s actually be sustainable in this movement.