Why wont my sister,and my parents let me buy transformers?

well basically i want to buy some transformers movie action figures but my dad,mom,and little sister will not let me but it is my money,and i have the right to do what i want with it!what can i do?Why wont my sister,and my parents let me buy transformers?Have you asked them the reason why? If they think you just throwing away your money just let them know that these toys becomes collectibles for some people and their value goes up in price with time and if they don鈥檛 believe you tell them to do a ebay search here : http://completed.shop.ebay.com/Action-Figures-/246/i.html?LH_Complete=1%26amp;_nkw=transformers%26amp;_catref=1%26amp;_fln=1%26amp;_trksid=p3286.c0.m282Why wont my sister,and my parents let me buy transformers?If you are over 18 then it is your money and they cannot prevent you from buying them. Otherwise, your parents are responsible for you and if they have a problem with them, they can forbid you from purchasing them.Why wont my sister,and my parents let me buy transformers?buy weed instead