Different cars over the past 12 years:
1. Piston through the block - reconned engine + labour. R20K.
2. Gearbox Replacement (both mounts snapped and "dropped" the gearbox) - around R12K
3. The second last car that I purchased (and took back within 5 days) would've cost me over R60k for electronics (ecu, wiring, aircon) and other odds n ends to be replaced. Bought the car at a "reputable" national dealership and immediately took it to a mechanic for inspection (I've learnt to do this over the years as car salesmen are lying bastards looking out for themselves). Was surprised and shocked when I heard all that was wrong with the car; the car that supposedly passed the dealership's checks. Took the car back, lodged a complaint with their head office, reported it and got my lawyer involved. Took a couple of months just to get my money back and I'm still waiting for a settlement (many months later).
Financially, I didn't lose a cent but my time is valuable and this adventure had cost me lots of time, not to mention the frustrations.