> Nearly everything sold on Amazon these days is 3rd parties. I'd wager somewhere in the 95%+ range. Same with "Prime" items (these are just 3rd parties that use the FBA option).

This matches what I see. What's even more annoying is that it seems like every third party seller also has decided it's a good idea to spam me with emails asking for reviews after every purchase. Amazon provides no way of unsubscribing from there (they block one particular seller if you contact them, which is utterly useless)