Get quotes from a number of insurance companies.
The quote will depend on age
Medical conditions including any treatment you are undergoing, historical medical condition's etc.
Where you want to travel in the world, different companies cover varies areas.
Single trip or yearly trip, surprisingly I found one year the annual trip was cheaper than the single trip.
You can cover medical only if you want, this will not cover cancellation of holiday.
You cannot compare one persons cost to the amount you have to pay.
I have used a number of insurance companies over the years we are with Allclear at the moment before this Staysure.