My boyfriend (18m) bought me (18f) a sword, but it feels like he just bought it for himself.

My boyfriend and I have been going out for 8 months.

About a month ago we were discussing Christmas gifts and a few weeks ago he asks me if I wanted to at least know what the first gift was. I smugly replied saying sure, and he said "But don't look at the price!" I saw it anyways since it was basically in my face, and he got me a sword from a certain anime. He told me he wanted to get me something that wasn't already on my wishlist but something that I would love.

I told him that I liked it, which I wasn't lying about. I asked him excitedly if that meant I could cosplay at a convention with it, and he said no because it was carbon steel and it'd be considered an actual weapon. After that, I just kind of thought that its only purpose was to sit in my room.

Anyways, it arrived at his house and he facetimed me with it in his hands, playing with it. I didn't really see it because I was still sleepy so when I was fully awake he sent me a video with it. I said half jokingly if it was my gift or his. And he says, "OUR gift :)". I kind of brushed it off until later on he posted it to his story with a caption related to the anime and I replied saying "I havent even seen it in real life and you're already displaying it for everyone to see, lol" He says, "yes" and I leave him on seen. He asks me why I didn't respond and I straight up tell him that it just feels like he bought the sword for him rather than for me.

I'm not saying that I would rather he not show it, I just found it weird for him to post my supposed gift on his story for all of hos followers and friends to see, while I haven't even got the chance to see it with my own eyes.

Even now, I feel bad for not really thinking the sword was a great purchase. For another thing, it was expensive! I'm not as materialistic as he is, so it's easy enough to get me something way less than the sword was. Additionally, if he wanted to get me a display piece, then an anime figure or something of the sort would take less space on my desk than a big ass sword that I'd likely have to mount against my wall. If he wanted to get me something that was anime-related, manga would have been perfect since he knows I prefer it over anime anyways! A foam sword would've even been more practical because at least I could take it to cons for cosplay..

I just don't know how to tell him. I don't regularly collect swords and it's just not practical for me to have. I feel bad because it's the thought that counts, but at the same time it doesn't feel like he was thinking at all. I am a known hoarder and it'll just sit on top of the many things I have just laying in my room.

TL;DR: my boyfriend bought me an expensive steel anime sword but he's posted about it on socials and it doesn't feel like a gift for me (in the sense that he bought it for himself and that he wasn't actually considering what I like). How do I tell him I don't really like it even though I appreciate it?

EDIT: wow, didn't think this post would gain as much traction as it did. Thank you everyone who commented and sorry if I didn't reply to yours, but pretty much everyone said the same thing I was thinking.

If you read my replies to some comments, I spoke with him over the phone & we discussed this issue and other problems we've had for a little while. It was resolved, mostly at least. He still thinks I should keep the sword despite me making very valid points as to why I shouldn't. I'm seeing him today so I'm hopeful I can convince him that returning a $$$ sword is less of a hassle than me keeping it in my junk-filled room haha.