Man, I feel your pain. Went through the exact same nightmare last quarter for our office fit-out. Honestly, those native Amazon lists are just garbage for collaboration. We stopped using them entirely. Everyone dumps links into a shared Trello board instead. My team posts their items, then I review and add them to the cart myself. It costs nothing extra and saves me a massive headache. Dont waste your time fighting the Amazon UI.

Honestly, I've tried many ways to fix this over the years and it's still kinda finicky. You basically have two paths:

• Native Shared Lists: Free and built-in, but the sync lag is brutal.
• Multi-user browser tools: Real-time and fast, but everyone needs the same plugin. Look at how to share amazon cart for a solid breakdown on getting those editor permissions synced properly before your Friday deadline hits.

In my experience, I think you are looking for the Collaborative toggle. Over the years, I have found that this setting isnt always obvious. IIRC, it is hidden under the Share link on the list page. Not sure but I think these steps work:

• Select your master list
• Click Share with others
• Switch access to Collaborative Someone told me this is the most efficient way to keep track of costs without managing five separate carts.