Ways to earn Money Online

Can i earn extra money online for me?

hi i am 14 and live in the uk i already have a job working with my parents in there business they pay me a good wage i am not afraid to say they pay me 2000gbp for a month of saturdays witch is quite high for a 14 year old in the uk,. However i have expensive taste and live with my parents they say that i need to learn some responsabilty and make me pay £500.00 for my part of our house and they still pay for everything alse. So therfore i wanted to enquire about if anyone knows any ways that i could make the missing £500.00 back

sell some of your stuff to relatives or have a garage/yard sale/or sell the stuff on ebay(u could sell computers,laptops,video games thats what id do or just simply get another job:)