Should I fix my truck or sell it and buy something else?

I'm a 17 year old male and I have and old Ford F150. I really like this truck. I prefer older vehicles. The body is really rusty and the frame is weak. It needs some mechanical parts too. The gas gauge just broke too. I know a lot about this truck. I've wanted one since I was a little kid. Should I try to fix mine up? Should I sell it and try to find another one in better shape?

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