$50 will be about €45 on amazon.de and shipping can be free if you spend a minimum amount about €29 to €59 depending on EU destination for some EU countries and for those not free then Amazon usually charges a base fee per delivery plus a weight fee commonly around €5.50 to €7.50 per shipment + €0.60 to €1.30 per kg within the EU, meaning a small parcel is often around €7 to €12.
TaDa gaming doesn't show RTP as far as I can see so I'm not going to play them when they could be on 88% for all I know.
Also, $50 on Amazon.. I don't know. That's just about what shipping costs these days..