LÖWENBRÄU Beer Keg for PerfectDraft Machine, 6L (£31.45 / £28.14 max S&S)

One of the highest rated beers on the perfectdraft – the S&S price (and £5 beer credit for keg return) brings it down to £2.50 a pint.
There are also plenty of other kegs available on amazon for the early black Friday deal.
If you are after a machine, use code PDRMW98A4CH00 for an additional £20 off on the perfectdraft website, can be had for around £100 or so.