I NEED Help Building a PC!

I need help building my first PC for under $250. I saw the video on the $250 gaming rig but i can only find some of the parts. I added some parts to the build instead of the ones i couldnt find, and my question is Should I buy a "LOGISYS Computer 368 SOHO CS368BB Black / Blue Steel / Plastic Computer Case 480W Power Supply" ? Im not sure if i should get a case with the power supply or without. Please help.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817822005

http://www.newegg.com/Product/Product.aspx?Item=N82E16811353020

http://www.newegg.com/Product/Product.aspx?Item=N82E16819106002

http://www.newegg.com/Product/Product.aspx?Item=N82E16820576002

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130641

http://www.newegg.com/Product/Product.aspx?Item=N82E16822136771

 

Just take this, but remember. A $250 wont do much

Thanks a bunch. I know it wont do much but thats all I have to spend right now. but thanks again.