While I am a huge fan of roll on body oil smell good stuffs, 18$ is not only a sham, but a flim flam as well.
Ebay has great options; I suggest a Tom Ford Tobacco Vanilla knock off if you want to dip your toe in with something that is universally loved.
bg1256I find anything with 99% or higher is usually a legit source. House of Glois is fantastic (google it, not ebay), but in my opinion, the fragrances that are meant to smell like cologne or perfume fall short. Go for the crazy niche like scents they have if you're the kind of person who likes smelling like a mixture between lemongrass and antique literature.
bg1256https://ca.oilperfumery.com/ I am using these, I like the smell, but longevity might be an issue, they have a decent range to choose from, some of the reviewers own the actual perfume they are based on and they still like it.