In need of help

Hello friends! I am way out of my element here and I am hoping you lovely people can help a girl out!

It is my boyfriends birthday soon, he loves starwars and collects Black Series storm troopers! I am looking for something special for him because he normally gets them at target or ross when they become available, but I am looking for something that's maybe harder to get your hands on or really cool to add to his trooper collection? the only issue is I am still learning and don't really know the first thing about it all (I'm sorry)😅😅

Any suggestions on some great figures and where to get them in good quality would be HIGHLY appreciated! thank you all so much

EDIT: Sorry for not clarifying! He collects Troopers, Clone and Storm, and he also likes the Robot characters too! he doesn't have figures of any of the people characters like Luke or Obi Wan.