My point was merely to correct you as regards the current exchange rate between pound and dollar. First, you estimated that a used Essential 3160 can be found for $2500, and then you estimated you could find one in the UK for only 1200 GBP, which is much less than $2500. US$2500 is more like 1950 GBP. I now see that you simply mis-estimated the exchange rate. There is also a question whether the 3160 can run on 240V. Possibly it can do so; I think there is a switch on the rear of the PS chassis or inside the PS chassis, for that, but maybe not.
No matter what most of us say, most of us (including you and I) at least occasionally fall into the trap of equating cost with level of performance, which is nearly always misleading if not plain wrong.