Currently Being ModeratedApr 30, 2013 3:12 AM (in response to Lady Engineer)
Not all plug-ins are listed on the Plug-in page, and some of the listed ones are no longer available. That page needs updating.
Before you download and buy any plug-in, check the compatibility with your Aperture version. Some plug-ins may not work with Aperture 3.4 or later, see: