What should I buy my boyfriend for our first Christmas together?

It's our first Christmas together, and he mentioned that he’s spent over £50 on me. I’d like to match that amount for him, aiming to neither overwhelm nor underwhelm him. I appreciate that he shares his interests and passions with me. However, he often buys himself what he wants, so I need to be cautious to avoid getting him something he might end up treating himself to instead. I’m looking for ideas that he hasn’t explicitly mentioned, so I have a broader selection to choose from. Thanks!