Ok, I just bought a very used 300td. Got the brakes checked because there was a noticable grinding happening when depressing brake, and sound continued first few seconds of driving after braking.

I took it to a local Benz specialist and he said it would cost $1000+ to fix the brakes!?!?
What could possibly be wrong to cost that much for the brakes??

I bought this car for $900, it has some rust, runs ok, it seems like it just needs a bit of a tune up. 200,000 miles on it.

Should I spend the money to fix these brakes? Or am I getting ripped a new one?