Yes, it happens a lot with older sealed albums, I noticed it too. I believe most shops still use neon or similar lights in Asia, which "eat up" colour with time. Since albums are usually stored with the obi part sticking out, the rest being protected by light...
You will notice that usually, the obi is faded a lot, and then a slight vertical line of fading makes it to the front/back of the obi, but only a little, where it can still be reached by light. So you can end up with a 3-colour obi:
- Very faded on the side
- A little bit faded at the beginning of the front/back
- Not faded on the rest of the obi.
This one here is another case, the orange faded to yellow, except the spine part where it basically faded to white. Poor thing.
http://vgmdb.net/forums/attachment.php? … 1472962797
(Notice how blue and purple have not been affected, or very little.)
And yes, I mind, but it won't be a deal breaker unless the fading is as bad as the example pictured above (which isn't a sealed album anyway).