To me, you would be better off buying from someone you know and that knows your skills. Someone that has a horse with some major issues, might lie to you and get you hurt, which I think would happen less with people you know, however don't take that for a certainty as a horse that will behave fine for me, might act like the village idiot for you, it all depends on what you know when you are dealing with a horse.
I would be more leery of auction house, as you can get caught up in the moment and lose your head and buy something that is not good for you.
I am also unaware if you have facilities to keep horse, and if parents are on board about this, you may have said somewhere, but don't know, and for all I know you may be 100 years old too, but am thinking you are young?
That said, if you want, I can talk to farrier I know from IN, and see if he has anything that might suit, if you would PM me what it is you want, in terms of training, age, discipline, mare or gelding and price. He generally knows all sorts of horses for sale.
Horses make me a better person.