Have you smell the musty smell of basement before?
can you get it as a fragrance oil?
Yes, I like that smell, that smelly smell that smells smelly...As a fragrance oil though? I'm sure someone's bottled it...
I don't think so. But then I've never looked for it; never wanted to create the "musty basement" aroma.
honestly I think the closest scent out there that comes to mind for what you're asking for is patchouli oil!
Spray it with some perfume and throw a few moth balls in it.
I've smelled a basement...:P