On the other hand, if the price is right, u should go for it, it doesn't really matter, unless u want a PG and thats it. They list positions funny for 18yos and a 6'11" PG if trained as a PF or C, his listed position will change. Also, if he is tall, really what matters for him to be a C or PF is to train the "right skills" for a big.
My main trainee is 6'6" and was listed originally as a PF, but I knew he wasnt tall enough. Ive been training him as a PG to get his outside skills up and later will train him as a C to get the inside skills, to make him a SF. After a few weeks of training he went from listed PF to SF... Their original position doesnt matter too much...