I thought I could avoid Amazon by using eBay for things I can't find locally. Unfortunately, sellers on eBay often use Amazon warehouses, so items I ordered arrived in Amazon packaging, and there's no way to tell prior to ordering. What a disappointment.
https://community.ebay.com/t5/Buying/We-need-a-way-to-avoid-sellers-from-Amazon-on-Ebay/td-p/34235126/page/2