I assume you're asking if it's worth it to get it solely for the vanity pet. If so, then the only real person who can answer that is you, as it's your money. If you've got that kind of disposable income and you really want the pet, then I suppose it'd be worth it.
I will say though, that price seems extremely low to me, and makes me think it is an opened CE with the code already redeemed? So if you decide to get it, make sure you double-check and triple-check that the code for the pet has not been redeemed before purchasing.