here we go, these are the parts you need
motherboard(mobo)-for intel mobo w/ AGP slots-$50 bucks should do
w/PCI-E slots -$70
same price for AMD w/ same slots
CPU- this is one of the most expensive parts.
for you, go with Intel Celeron or AMD Semprons. They can be bought at around $50 and be good enough for everyday use.
Harddrive-80GB are about the smallest you can go these days -$50
Ram- youo probably only need 512mb or lower, for $50 or less
Power-a cheap can be got for $20 or less but you're taking the risk of frying your rig
Case- standard atx case is less than $20
CD-Rom-very cheap, dvd-cost a bit more but a cd-rw is included
cpu fans and heat sink-AMD CPU come with it and Intel needs one for Like $15-20
Video card- for a cheap rig you cheap go with integrated video on Intel mobo, or you can get an old one for less than $50
Monitors cost the most for your rig
CRT-50-100$ depending on brand and size
LCD-no lesss than $150
keep in mind these prices are in the US not Kuwait