Gift ideas for BF

Hi! My boyfriend is 18 and he has a lot of fishing gear and what not and I know virtually nothing about fishing. However I do wanna get him gifts eventually I’m just worried I’ll get him stuff he definitely already has (like the most basic things) or something pointless or poor quality. So any gift ideas ranging from cheap to expensive (to eventually save up for) would be great!

Not sure if it’s relevant but we’re from New England