Yoogie's Closet has a 30 day return window and I managed to get them to pay for my return. But still, it's such a shame that these companies claim 100% authenticity while still selling fake bags every so often. It may not be as often as every other bag but it's certainly common enough to be a real issue.
I used a reputable third-party authentication site to authenticate it, but after they told me it was fake, I went to see some real box bags and the difference was really staggering. I would think that any "expert" that's authenticating bags at these reseller sites should have seen such glaring differences or at least set the bag aside for further review. Even more ridiculous is that these sites will never admit that they made a mistake. They replied saying that they'll accept the return but possibly put the bag back up for sale if their in-house "expert" ok's it!
And I agree that since there are so many high quality fake box bags in the market, I would just save more to buy a new one from the boutique.