And yet here you are and you're apparently well known.
I don't know the backstory here but this I know - if you have proof you paid him $300 then call a lawyer - otherwise quit whining?
Not really sure what brought this up so many years later but clearly something in your personal life has affected your decision making regarding money. I'm guessing your car is broke down and you need the money? Maybe rent is due?
If you need to borrow money maybe a gofundme account would suit you better then to come on here and make a fool of yourself, what you're doing is not going to get the results you're looking for.
Good luck, let me know if you need help setting up a gofundme account