I have seen that there are collectors in this forum, and I know very well that there are very difficult roms to find.
So I am going to share these which are currently rare to find.
I personally am looking for these.
-Megaman X Age of Willy (Megaman 1 Hack)
-Gremlins (Hack of Hudson Hawk de nes)
-Angel + Buffy (Hack of Shadow of the ninja of nes)
-Guardians of the Galaxy (Hack of bucky o'hare de nes)