see the thing is... I had my friend inspect it and pick it up. it had shaft play on it, BUT my friend took it anyway because the seller said it was normal, and would seize up when oiled and hot (momentum said the same thing). I honestly don't know enough about turbos to know what it means for it to be "blown," or what shaft play indicates exactly.
there are white marks on the uppipe and downpipe, so I know the leak is coming from the turbo. I know it's not oil, because my oil level is fine but my coolant is not. I guess it's possible the leak is coming from one of the coolant lines, but there are no signs of coolant dripping from there. It's really hard to pinpoint because the coolant leaks slowly. I've tried driving the car around for a while, parking up some ramps and looking for leaks while the car is still running, but it's no use.
Apart from the shaft play and loss of coolant, there is nothing else wrong. I highly doubt any of the blades are damaged, just because I've gone WOT a few times and it drove fine.