You can shop by Poser products by using the faceting on the sidebar in the marketplace.  If you go to say "What's New" then click on the department drop down to choose what type of item you'd like to see for example 3D figure essentials (which is clothing, characters, hair, shoes, etc) once you do that then you will see on the left side all the different sub depts so you can click on what Poser version there or you can go further and be more specific first by saying you want to look at Hair, then click the Hair sub dept and it will bring up all Hair products and from there you can then go down and click to see every hair in Poser version (whatever you use). 

Or you can type the type of item in the search bar you are looking for, say Sci fi then the faceting sidebar will be there for you to narrow down even further and you can choose the software type you want that you use (Poser in your case).

There are several different ways you can search through Poser products by using the sidebar faceting.

hope that helps some