Yes, you can sell stuff under $20….use envelopes too; they don’t require a label. I wonder if a buyer ‘bulks up’ and takes you over $20, what will happen then ??

I am in a similar situation to you .. and sell a variety of stuff which was all mine as I am destashing hobbies and items I dont use .. like you, I use my own packaging and many items will go as normal untracked post which ebay does not seem to cover .. I think I read somewhere in one of their posts that if item is under $20 (and presume this would be total of item plus post)  then it was not mandated to use Ebay labels ..but I am unsure ..  I also liked to revert to the old ebay format for sending as I find this better than the new one but it seems the ability to change to the old format has been eliminated .. 

Go to HELP and type in ‘compare plans’