There hasn't been one dime spent that I would want back. However, I do regret not buying a certain vintage blonde Fender Telecaster with hard shell case for sale in a local mall in Pittsburgh more than 30 years ago. She could have made me very happy and I think of her all the time. When I bring the subject up my wife reminds me that during that same period we used to go to a certain phone booth where the change return box often malfunctioned and spit out just enough dimes to buy a slice of pizza. What is more important though....eating or dreaming?