say you find used rotors for $50... fine, but new ones are not THAT much more... you could even get new fronts and used rears for a non-auto-x car...
rebuild kits for calipers: $20x4 =80
new pads: maybe another $50, $100 for much better ones... (I think I paid $65/front set for porterfields, r4s)
brake fluid $12
new soft lines $40 (if needed, good idea)
if needed, a new M/C is about $100... but you probably do not need it... unless brake fluid is pooling @ the cluster...
small price for the most important pieces of equipment on your car... the only safety equipment we have on these cars is the brakes and the seat belts, and to you want to trust 30+ year old seat belts to make sure you see your wife and kids again?
myself, I spared no expense on brakes...