[mikeash]

From the user's (i.e. my) perspective, "Marketplace" offerings are still things that Amazon sells. The "Prime" checkbox doesn't work well. It doesn't filter out add-on items (which can be removed with another checkbox), and it doesn't do a very good job of only showing me Prime items. Searching for hard drives, just as a random example, I get results where the primary seller isn't Prime, and the Prime option is either more expensive than what's listed, or is a used or refurbished item. I'm sure there's a combination of checkboxes that will do what I want, but they sure don't seem to be optimizing for the common case.

[dpark]

I don't have any particular problem with the system as it is today. I certainly wouldn't complain if Amazon made it more obvious/friendlier, though.