I urge you to get an $80 fragrance you really love rather than a $40 one you won't. Even if finances is rough, you'll come across $40 more dollars again, but if you buy something just because it's cheap you'll regret once you realize what you could have gotten.
A fragrance is something that can last you years. And in time, the investment will be worth it.
If you love Bleu de Chanel. Save up money for another week and get Bleu de Chanel. Period.