Okay Lee, here's how I broke down a PC (for my needs) to buy parts

(Item / explanation / example)

1 - A case/tower : for everything to fit into ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...741762647&rd=1 )

2 - PSU : Power Supply (see above item - includes PSU)

3 - Motherboard : PC's circuitry ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...741946951&rd=1 )

4 - Processor : or known as "chip" (http://cgi.ebay.co.uk/ws/eBayISAPI.d...sPageName=WDVW )

5 - RAM : PC's memory ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...742358051&rd=1 )

7 - Grafix card - for video grafix ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...162878275&rd=1 )

8 - Sound card : for sound output and input ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...162935861&rd=1 )

Then you need storage drives;

1 - HDD : hard drive ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...sPageName=WDVW )

2 - CDRW : CD ROM and Rewriter ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...162381558&rd=1 )

3 - DVD-RW : DVD-ROM and ReWriter ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...sPageName=WDVW )

Then Peripherals;

1 - Keyboard and mouse : err, ( http://cgi.ebay.co.uk/ws/eBayISAPI.d...162597652&rd=1 )