are you looking for a single policy or family?
europe or worldwide? www.123.ie is the first one i looked at - €98.50 for 2 adults & 1 child worldwide including usa canada, though i see that they now exclude afghastan, cuba, sudan and liberia.
Depends on where you are going and if you have private health cover already. We pay about €57 for an annual worldwide policy for a couple with health insurance.