z11 is about $50 brand new even though its a [censored] rubbish case (I've had it before) 212 evo is a budget heat sink won't keep that CPU very cool if overclocked. LGA 2011 socket motherboard (Brand?) released Q3 2013, so pretty old. i7 4820k same thing 2013. 2tb hdd, could be very old who knows corsair 550? is this the CX brand? if so its pretty bad 32gb of ram not bad and rx 480? what version? Overall for 630 pounds converts to about $780 USD I'd say it's not the worst deal... Even though a lot of the parts could be old and worn out or on the verge of warring out.
looking by them i think i can get £800 cause those have of what i have e.g mine has 2tb they all have 1tb, mine has 32gb ram they all have 16gb ram, graphics cards are all similar and none have a fan controller. So yea u should get the idea from what im saying and am pretty confident i could get £800 well... if i decide to sell it that is.....