I am sixteen, and I use eBay. I haven't sold 
anything, but i didn't need any parental help to 
do so. I also have Positive 22 feedback and 
counting, no negatives or neutrals. I think it 
sucks about that you must be a legal adult rule. I 
guess it must be that way though because of the 
large numbers of irresponsible teenagers that roam 
the earth, who ruin it for everyone else.