PSA Meet Cairn the dog (Info, not for sale)

PSA this is Cairn, s/he has been groomed with a lovely haircut that suits her RBF disposition well. S/he doesn’t read my policy that buyer must bundle low cost items until his/her bundle costs AT LEAST $15 minimum (excluding shipping and tax fees) before she makes had a purchase. She then laments with a barrage of angry harassing emails when I cancel and fully refund her/his order since it cost less than $15 and doesn’t follow my clearly stated bundling requirements. Cairn complains that that S/he doesn’t want anything else and that I should honor the sale, completely blind to my stated $15 minimum purchase policy. S/he doesn’t understand that the profit margin is too low on low cost items, and the fact that it takes me time to cancel the sale, email him/her, copy the canceled listing and relist the original item. S/he thinks that by threatening me with “reporting me” .. her fave past time of speaking to managers..will bully me into succumbing to her privileged desires. Let’s all make buying and selling on Poshmark a fun experience; aka Don’t be a Cairn. PS This issue could be circumvented if PM came up with (an optional) minimum purchase policy, that is set by the seller. Yet, this may be too confusing for new buyers (?). Thoughts? Other solutions? Hopefully this post wasn’t too Cairn-ish of me :) .. all in good (sarcastic) fun :)