What’s the worst amount of body damage/bondo you discovered after you bought the car??

Can't tell you how much bondo was on my '69 Dart when I first bought it.
I'm in SoCal and my Dart was in Oregon when I bought it from pictures on eBay only. I lucked out because the car was almost completely rust free when it was delivered. But a check inside the trunk found evidence that something put a fairly sizeable dent in the passenger side rear quarter just above and ahead of the rear tire. The outside of the car looked perfect.
After having the entire car media blasted, the passenger side rear quarter looked like a fat lady's dimpled butt full of cellulite.
The first paint shop I took the car to put a new skin on but messed up the placement and screwed up the body lines around the tail light.
The second paint shop...never mind, that was a disaster.
Finally, the shop that finished the paint/body fixed all of the issues and the body lines (and there're a bunch of them on '67-'69 Darts) are perfect!