Ashley9803 is correct, but... a newcomer to Poser 7 isn't going to be in a position to be creating clothing for a little supported character from scratch.   When everything seems to be for someting called "V4", you may feel obliged to use that same "V4".   I'm not sure how the content marketplaces organise their displays, but I suspect that they tend to favour new items.   Even if they occasionally disguise that by listing things in order of popularity, in the short term, it's pretty likely that the newest items on sale are also going to be the most "popular".   There is a huge amount of V3 material out there, but V3 has the dice stacked against her, so you should expect V3 material to start to vanish at a rapid rate.

The problem is that the V4 designers seem to have concentrated exclusively on what is below the neck.   In the RMP right now, near the top, are morph-and-teaxture sets for V4 which display just how limited V4 is.   They are made by rightly respected artists, who create terrific textures, but their morphs are virtually identical.   Whatever the faults of the "Amazonian" V3, she possesses vastly more facial flexibility than V4 does;  so do the G2 characters (both sexes) and the Mikis.