Thinking of starting my own business on Ebay?

[Sean]

Hi, i am 15 and i really don't want to be relying on my family to buy the things I want, I think i earn some independence when I purchase things myself. I recently bought my own gaming set up and my mobile phone. I got that money from selling some of my old stuff on facebook. However, I really want to buy myself a decent gaming computer which will cost around £400. So i was wondering, do you guys have any ideas of what i could perhaps make myself then sell on ebay?
I realise that iPhone covers are quite successful on Ebay, but how would i get my hands on stock?

Also, I Know that you must be aged 18+ and have some type of card. I get my debit card next year when i go to college. So, in the meantime, could I just put in a fake DoB and use my brothers debit card?

Ideas of products and a company Name a greatly appreciated!