Frontline Plus - Deal or No Deal?

I was shopping on line for Frontline, and found this website that was selling 6 months of Frontline Plus for $50 and change, with free shipping. That is quite a deal for Frontline, almost half what I would pay for 6 months from my vet or local pet store.

Thing is; it is in Australia. I'm a little afraid that this might be some kind of scam with counterfeit drugs, though the web site addresses the issue and says that all their products are the genuine article.

Has anyone ordered products from this place or similar? Did the product come in a timely manner - and more importantly, did you get what you paid for?

Here's the website - https://www.vetshoponline.com/index.cfm/fuseaction/websitenews.article/websitenews_id_pk/70C81826-1804-9620-B38DE8913C1C1008.htm