Jem Fashions
If you have *no* clue about what you have to ID, click here for a page of thumbnails of every Jem fashion.
There were many different sets of fashions released.  Some were released only the first year, some were released both years, some only the second year.  The packaging differed- the first year fashions only had illustrations on the packages, the second year outfits had photographs of the dolls wearing them.  Generally speaking, second year fashions are worth more, especially those only released the second year.   

1st and 2nd Year On Stage Fashions
1st and 2nd Year Flip-Side Fashions
1st and 2nd Year Smashin' Fashions and 2nd Year Rio Fashions
Glitter N' Gold and Music is Magic Fashions (2nd year only)
MTV Jacket; Mail away offer.
Jem Playsets
The Jem playsets fell into a few categories; #1 the Car, #2 the large "air" instruments for children to play that converted into a doll playset and #3 accessories and backdrops to use with the Star Stage called "Video Madness Playsets".  The car came out both years in different incarnations, and the rest of the playsets were sold both years or just the second year.

Playsets from both years
Click here for information about prototypes and unproduced dolls/fashions.