I fixed 6500 bucks worth of damage to my protege with 30 bucks. Well, if you count the body hammer set I bought and the seal, more like 80......
I had hit a nice chunk of steel beam on the highway that punched a hole in the trans and ripped a 14" gash in the floorpan under my butt.
30 bucks for a used trans case, hammered the floor down, mig welded it up and some rubberized undercoating. The insurance company was going with a new trans and replacing the entire floorpan. I got 5700 bucks and have put another 100K on the car since then.