new mother board (CPU)

ok im currently looking for a new motherboard since im mutilating my hp one and im having no luck finding one i remember seeing one called xfx 650 im also looking for a new case preferably a cyber spacy one

im trying hard but am having no luck finding cheap but good cases/

just buy a new cpu on ebay or ubid........

im one those people that doesnt like to buy from other people because it could be in bad condition and im only 12 so i dont even have a credit card my mom also wont buy it because she thinks a graphix card is all i need.

only thing im capable of doing is taking everything out of my computer and putting in the new board and put everything back in