Making a living off of ebay. ???!?

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I was thinking of buying and resealing stuff on ebay. First it would be airsoft guns. And maybe later on maybe other things. I am 16 and would use my parents ebay and paypal and I have there . I am into airsoft guns and know a lot abt them that's why I was thinking abt this. I have a few hundred to start with. And I know I can probably profit off stuff like this. Do you think I should? Any advice, or tips? Thanks. Also do you have to give a social security number to ebay or paypal? I was thinking of opening an account on my own and not upswing my parents. I used to but I canceled my account over a year ago. Thanks

Making a living off of ebay. ???!?