Disco no brakes

Been lookin at a 200tdi looks pretty straight and chassis is solid although it has the usual rotten boot floor and a small hole on the rear crossmember.
There are a couple of thing bothering me, there is no brakes the pedal goes to the floor but I cant find any leaks and after a few pumps the pedal starts to come up a bit then back down to the floor looks like its had new pipes.
When I got in it the other day I tried to move the the diff lock but it was stiff then nothing so now it does f all.
Its a late 200 series with about 96k or something on the clock and the mingy blue interior is realy clean, £600 worth it?

, £600 worth it?[/QUOTE]
No. I bought one with tax and MOT a couple of weeks ago for 500 of your english pounds. There's one in the for sale section on here for 400. I'd say 400ish if you want to use it for parts, otherwise leave it where it is.