Authentic Jersey?

Hi all,

Just received this jersey from a Mystery Box. Im from the UK and not very knowledgeable with things like this. I paid £35 ($43) for it and I was wondering if it’s authentic merchandise and if so how much it would actually cost?

If anyone can help with this that’d be great. I’m not bothered if it’s a fake so just let me know!

If this post isn’t appropriate then let me know and I’ll remove it.

Thanks!