I'll go to Aliexpress and eBay first for: "kids toys, cables, generic keyboards, battery chargers, basic tools, and basic clothing."
I have the exact same list for them as for Amazon. I'll go there first for those products since Aliexpress has much better prices than Amazon. eBay has better seller reviews. I certainly wouldn't buy food or medicine from them, though, or even bedsheets or SD cards.
Walmart is a lot better than Amazon. They do have a search filter to disable marketplace sellers, and if buying from Walmart proper, I do trust them to still get supply chains adequately right. Amazon did okay here too, even a half-decade ago; it crapped out with Covid and never fixed itself. Perhaps Walmart will crap out too, but it hasn't yet.
I do too. I don't use Amazon Prime and can usually find the same products for cheaper on ebay with free shipping. The competition among other sellers is greater on ebay so the price will often be lower. It is difficult to do returns though
0*100 = 0.
Aliexpress is fast, efficient, but completely random and automated in resolution. Products from Aliexpress are great 50% of the time, non-working or not shipped 10% of the time, and somewhere in between 40% of the time. It's cheap and complete roulette.
That's okay for a lot of things.