19 euro for 60 days GC
8 euro for vanilla + 1 month
7.50 euro for bc
20 euro for lich king

here

(if u go paypal they will ask for an ID scan and phone number to contact you, afterwards they deliver the keys within minutes to your email account)

the prices you have there are very sharp, i've done quite some research here (belgium) as well and the aforementioned link beats everything