Buying DVDs online - Your suggestions would be appreciated

Buying DVDs online - Your suggestions would be appreciated

I have my heart set to find a box set of the complete series of The Little House on the Prairie to give it as a gift. Sadly there does not seem to be any available in Region 2 at affordable prices, and whatever is available has the box in German, so it does not make much sense. I finally managed to find it from this site http://www.buydvdus.com/product-Little-House-on-the-Prairie-Seasons-1-9-DVD-Boxset-1962.html
but since they only accept payment by card I am a bit wary. I assume I would not be getting any sort of buyer protection, and I am not sure if I can trust this site especially after reading this review here - http://www.scamner.com/check/buydvdus.com

I am tired of looking and am starting to give up. I thought of posting here just in case anyone based in Europe knows of any good site where to buy dvds. Any suggestions would be greatly appreciated.