Reading Hanna Brooks Olsen’s No, You Cannot Have “A Few Minutes” Of My Time, led to me digging out a form response I use quite frequently. So frequently that I store it in Typinator so that I only have to type ‘!best_of_luck’ in an email response:
Thanks for the inquiry. I only participate in these sorts of engagements for love or money. Since I don’t know you, this would have to entail payment for my time. If you are interested, let me know, and we’ll try to work out a deal. Otherwise, best of luck.