You pawned a laptop using it as security for a 200$ loan
So if you now repaid the 200 you would normally get your own one back , but that cant happen cos its gone
BUT if they replaced it with one exactly the same then you would be in the same position as if you got your own one back (apart from the files on it)
The loss of the files is largely your own fault - you should have created backup copies as this is ALWAYS recommended
The loss of personal info is also partly your own fault - partly cos you should have backup copies AND that it should have been encrypted to prevent access (there is a lot of free encryption software available)
Nothing can be done about the files, but whats the problem with accepting the replacement if you can carry out some testing on it professionally at their expense?-
That together with some compensation for the lost files and you repaying the loan(which is what you would have to pay to get your own one back) is the best you could expect (or maybe them just writing off the loan)
what you AINT gonna get is a new one when you only got a loan of 200$ with the old one as security (as 200$ is what they think its value was)