careful selection is key to satisfaction with your budget. here is my recommendation.
7,000 Intel I3 4130 LGA1150 CPU
3,000 Corsair 1600 MHz 4GB RAM
4,000 Asrock or Gigabyte H81 Mother board or a similar B85 board under 5k
7,000 ATI Radeon Asus R7 250 1gb DDR5 or ATI Radeon Sapphire HD7750 2gb DDR3 Graphics card
4,000 Seagate SATA 1Tb 7200rpm HDD
2,000 Zebronics/iBall or other local/chinese slim cabinet with SMPS 450 W
3,000 Keyboard & Mouse Local (600), 2.1 Creative Speakers (1400), DVD Drive (1000)
6,000 Acer/Asus/BenQ/Dqll 18.5 inch LED Wide Monitor
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36,000 half life's value build
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Notes:
1. Not included is the cost of software such as operating system, anti viurs, etc
2. Consider a UPS, costs about 1,500 but is very useful
3. Consider a computer desk and chair, they only cost a coupel of thousands