I'm pretty sure big bumpers didn't come in till '89, so it looks like its had a conversion. This always puts me off for some reason, don't know why.
Dodgy brakes wouldn't put me off (so long as it was safe enough to drive home!!) as its one of the simplest systems on a car i.e. the problem will probably be limited to servo, master cylinder, lines, callipers, discs or pads, and its probably only one of those items (I would put my money on the master cylinder).