The cost of COD Points depends on how many you want to buy. Here's a list of the prices:
500 COD Points - €4,99
1100 COD Points - €9,99
2400 COD Points - €19,99
5000 COD Points - €39,99
9500 COD Points - €74,99
13.000 COD Points - €99,99
21.000 COD Points - €149,99