Well the problem is it's hardly foreseeable what the system thinks is a big amount.
I guess it depends on your past transactions, like if you have had transactions with >5k, then it *shouldn't* be a problem to do transactions like that in the future.
As far as i understand, the system might think something's fishy if
- a payment has been made thats a lot higher than any sum that has occured in yours or the other partys account
- several payments in the 1k region occur within a short period of time compared to the number of transactions in the past.
You see, it's hard to say - even the support staff seem to have no idea when,if,why the system waives the red flag.
In my case, because i had been aware of the possible risk, i even called up support *prior* to transaction to make sure such a freezing thing would not happen, support guy said he would not see a reason why it should happen and - it nevertheless still DID happen.
So my recommendation is don't use paypal for amounts >$1k unless you've done several transaction like that in the past OR have gone through that freezing hell like me once already - because THEN they suddenly hand out your personal support's guy phonenumber and everything.
Since that mess happened and has been resolved, they now treat me like a Platinum AmericanExpress holder there.
