To save on mechanic costs, a DIY approach can help. And there are plenty of car repairs you can do yourself. By way of example, over at Imgur, user sxpnthr uploaded a guide about how he fixed a car dent with boiling water.
All you need is a teapot of boiling water, rubber gloves so you don’t burn yourself, and another pot of cold water. Pour the hot water on the dent, and while it’s warm, reach from the inside and pop it out. Then, while it’s in the original shape, pour cold water so it quickly cools down. Check out the full gallery below for step-by-step instructions with pictures.