Synology Surveillance Station Camera x4 Licence arrived by email very quickly. Buying in GBP and the amount was slightly more than on the site (and the invoice!) but still cheapest I found on the web.
Strengths
best price, rapid e-delivery.
Reply Innocam - Cameralicense.com:
Hi Paul, thank for writing us your positive feedback! Yes, the local currencies online are always an approximation of the actual amount on the invoice, which is in Euro.