for what it's worth, in the event those 1099s do ever come to fruition [i've been selling online for a longgg time and never encountered one with paypal], you can write off basically all business oriented expenses. labels, supplies, hell even the membership fee for this forum. any sort of 'receipts' for purchase, whether it be from another member/ebay/etc can be used to write off the incurred 1099 balance owed. any valid tax-prep person would be able to take care of this and if you do your own taxes, you really only need to worry about physical receipts to be delivered in the event of an audit.
i think the entire subject of the 2022 1099-k fiasco is kind of blowing out of proportion. i did read talks of them revising it but we'll see if it really actually happens. zelle/venmo/cashapp all are viable as well but i am still a strong proponent of paypal g&s covering your ass. as others said in previous pages, f/f with that large of a sum of money could bite you in the ass. and nonetheless, no matter what paypal type you use, ALWAYS use a linked credit card for added security.
It applies to ALL payment processors including Zelle, cash app and venmo