I've never used this website before so I'm very sorry if this is the wrong place for this question! I have limited knowledge on vintage records and what makes them valuable however I think I have something really cool on my hands. I was volunteering for a local thrift store when I found a 1977 Warner bros. pressing of the Sex Pistols Never mind the bullocks album (pink background, green text). The owner of the store ended up giving it to me for only $2 as a thank you for helping out. The outside is in ok condition, there's a pen mark and some damage on the back but the vinyl itself is near mint. The dust sleeve is really intriguing to me though, I couldn't find any online that looked like it. There's printed on cursive writing that points to and circles different things on the sleeve which is making me think it's a really rare find. Does anybody know if this has any value?