i want to combine a gaming desktop PC, but dun know how to combine it... i have hard disk 500GB by seagate and gigabyte keyboard and mouse plus i have 3 speaker and a samsung dvd writer... i only need a cheap 24" Monitor (how much?), and a nice cheap CPU...

i dun know how to combine a nice CPU... like casing i should take what? Mainboard, GC, PS and if i take processor AMD, what is the name of the AMD i should take is good for game?

i dun need OS and any else software (but need driver software), just a empty CPU and Monnitor 24", should be around what price???