3600X is not £200! It is £239.99
My basket at Overclockers UK:
8700K is not £400 anymore for a 2 years old CPU, you can get second hand 8700K for £200 but I cant give you competitor links.
3600X has very poor OC with voltage too high while 8700K has plenty OC headroom.
Overall 8700K still has better value.
Ofc a used 8700k is better value then a new 3600 and 3600x used parts normally are. Most people are confusing the 3600 and 3600x though since the 3600 is the only odd one out on ryZen 3000 series with no x
But apples to apples ocuk have the the 8700k priced at 398.99 at the moment second hand cpu carry a lot of risk and no warranty and lots of other things people have to consider you could pay 200+ pounds of paperweight in a few months with no warranty.
Mans let’s be honest we are comparing the last intel flagship cpu vs bottom of the stack new ryZen cpu when do you expect the new intel 1060 i5 cpu to outstrip the 8th gen flagship I very much doubt it i5 will be a straight 6 core part.