Paypal is a double edged knife, about three months ago i had some obscure company try and take $150 out my bank which was like ?70 at the time luckily my bank turned it down becuase i dont have an overdraft(still being 17).You should always be incredibly careful when trading money over the internet, Paypal is not really worth it if you wont be using it too often( which is my case) but if something does go wrong paypal does have some rather annoying uber security features to work out what happened and unlock your account (i didn't realise my account had been locked for three months >.<)