Where i live it costs 900 +80€ shipping
still not worth it.
for 900 bucks you can get a far better setup.
if it's 900 where you live and is 2 years old
Cpu: i5 4590 -- new: 200€ -- it's used and a generation old, maybe 100€
Gpu: gtx 970 -- new:250-300€ but seriously outperformed by the 1060 for the same money -- anymore than 175€ would be throwing money away
Psu:cx600m -- new:65-70€ (and not worth that much) -- used maybe 20-30€ TOPS
Mobo: asus h97 plus -- new: 80-100€ -- used maybe 40€
Ssd 120gb 750 evo -- new: 60€ -- wouldn't spend more than 20€ on it especially if you don't know how much more you can put on it
Hdd: wd 1tb black -- new: 80€ -- 25€ used
A 40$ sound card -- new: 40€ -- let's be generous and give him 30€ for it
calculated with German prices you can get these parts new for 850€ tops, used I wouldn't spend more than 400€ on it, maybe 450 because he's a friend, buying from a stranger 350€ would be my target to settle upon.