They accept Paypal yes? then based on experience from the others here (I haven't personally bought any of the MOCs from this seller but I have bought from South American countries) I would go for it if she is your grail especially. Plus you have plenty buyer protection as long as you keep an eye on the deadline. I would expect 3-4 weeks arrival time but it may be quicker (or a little slower - usually depending on getting through customs.,..)
I think I would also take the advice to send the seller a message about packing this pony securely since you don't want the card to get damaged during shipping
Here's hoping all goes well and you get your grail hun