Annoying but at least Walmart still has the option to filter out third party sellers (under Filters, select Retailer and then Walmart). IIRC Amazon used to support this, but not anymore. I guess it wouldn't even do you much good with the commingling issue.

They do have that filter but annoyingly it resets between each search. I don't buy a ton from Walmart but I typically buy allergy medicine there since it's cheap. So I go to walmart.com, search for "allergy medicine", scroll through the filters and then click Retailer->Walmart and then pick my poison. Then I realize I need to add a few bucks worth of stuff to hit the free shipping threshold so I search for "dark chocolate" and add something to my cart...only to realize it wasn't directly from Walmart so it doesn't apply. For every search you have to go in and filter by Retailer->Walmart specifically. Ugh.

You can create a bookmarklet to only show items sold by Amazon: https://old.reddit.com/r/amazonprime/comments/13nyl2k/amazon...

yeah but those are easy to filter to results available in store. or even in my store, so i can go pick it up tonight even!