Not being funny but that machine will break in 3 months.
Horrible Chinese parts and low quality components.
Never EVER buy prebuilts off of ebay.
I have studied PC's for 7 years, I work in a computer shop, I build them and custom spec them and I am Cisco Comptia A+ qualified.
Buy that and you will regret it. The windows will probably be pirated too.
Yeah it may say 8gb ram, 8gb of low quality bad brand 1333mhz dimms, non 80 plus rated psu with crap caps in, low quality monitor (AOC aren't too cracking), bad keyboard and mouse you never use wireless for gaming as latency lag and response times. Although the hdd and cpu are good though, but I would not trust it, one of my friends bought something like this off of ebay and it broke within 4 months.
Here's my spec;
Total cost: £444.12 + £60 build charge which includes a 3 year warranty and it being built to perfection by specialists. This also includes windows being installed too and it all tested for you.
So the total would be £504.12 overall, its cheaper and much better than the ebay system. Play any old game you want no problem at all.
Bearing in mind this is a quick spec up what I did.
Now you may say it's only a pentium cpu, however 99% of games are single threaded meaning they only run on one logical and physical core within the cpu. The graphics card does all of the hard work.
The ram is a good brand which is certified by intel and has xmp support. http://www.cclonline.com/product/108810/PV38G160C9K/Desktop-Memory/Patriot-Black-Mamba-DDR3-8GB-Dual-Channel-Kit/RAM0926/
The case is a small little case that offers good cooling, isnt made out of tin and has usb3 and it looks decent as well. http://www.cclonline.com/product/132540/AVP-EL03B/Cases/AvP-Viper-Mini-Tower-Black-2-x-12cm-Fans-USB-3-0/CAS1076/
HDD is seagate barracuda, enough said as they are the most reliable and well known hdd's ever. http://www.cclonline.com/product/72741/ST1000DM003/Hard-Drives/Seagate-Barracuda-7200-14-1TB-Hard-Drive-7200rpm-SATA-64MB-Internal-/HDD1319/
PSU is and 80 plus EVGA psu, meaning you get continous 500w instead of peak 500w and they are much less prone to failing and blowing up. http://www.cclonline.com/product/133098/100-W1-0500-KR/Power-Supplies/EVGA-500W-Power-Supply-Unit/PSU0633/
Windows 7 is windows 7. http://www.cclonline.com/product/55272/GFC-02050/Operating-Systems/Microsoft-Windows-7-Home-Premium-64-bit-SP1-/SFT0066/
Monitor is a great monitor by a respectable brand and its a bargain at that price. http://www.cclonline.com/product/71177/ET-WS0HE-B01/Monitors/Acer-S220HQLBrbd-21-5-inch-Widescreen-Full-HD-LED-Monitor/MON0618/
Keyboard is a wired decent gigabyte along with the mouse, good brand and good quality. http://www.cclonline.com/product/76349/KM6150-UK/Keyboard-Mice-Bundles/Gigabyte-KM6150-Multimedia-Keyboard-and-Mouse-Set/KBD0442/
DVD drive is a dual layer burner, meaning you can burn anything apart from blu-rays. http://www.cclonline.com/product/123559/IHAS124-14/Optical-Drives/OEM-LiteOn-iHAS124-24X-DVD-RW-Dual-R-/RAM-SATA-Drive-Internal-Black-/CDR0201/
CPU is socket 1150 22nm haswell cpu clocked at 3.2ghz which is plenty enough for your needs. http://www.cclonline.com/product/123613/BX80646G3420/CPU-Processors/Intel-Pentium-G3420-3-20GHz-LGA1150-Retail/CPU0237/
GPU is a good entry level card which will play all of your games no problem at all and ultra to high settings. http://www.cclonline.com/product/81817/EAT6300HD41-1080F/Graphics-Cards/Palit-GeForce-GT-630-2GB-Graphics-Card/VGA0642/
Mobo is a great brand and great quality with usb3 on. http://www.cclonline.com/product/122464/90MB0GT0-M0EAY0/Motherboards/Asus-H81M-C-Motherboard-Core-i7/i5/i3/Pentium/Celeron-1150-H81-uATX-Gigabit-LAN-Integrated-Graphics-/MBD0725/
It would generally take around about 10 days to build and ship but it would be worth it, trust me.
If you wanted that you would have to call CCL up and request a custom system, they would explain to you the costs and everything. Say that Adam recommended you
Here are the contact deets; http://www.cclonline.com/page/contact-us/
My grammar and spelling will be bad on this as it is slightly rushed, but if want to know anything just ask.