My first custom built PC which i had initially bought off a friend with a G3258 Pentium CPU and 750ti Graphics card. Over time I have upgraded parts with the only parts left from the original build being the Motherboard, RAM and Powersupply.
I also run a Lenovo Thinkpad Yoga 12 which is using the original 128gb SSD from the build before I upgraded to a 256gb.

The white cables were hand-sleeved by myself using para-cord around the original PSU cables, while they are not perfect they look a lot better and are a good temporary solution until I can upgrade to Cablemod.
Most the the major parts have been bought used to save on costs meaning the total spent on the PC is around £500 including all the upgrades.