Was originally £46.99 now been reduced to £38.99
It's as it says, budget Power Supply. If you're running a single GPU (a GTX 1060 for example) you should be fine with this since power consumption is so low on the latest series. Check power consumption.
Absolutely not recommended for SLI, you would need something from the CS series.
Can't find a 650W cheaper anywhere else, they retail new £50 to £60.
They claim factory certified refurbishment by Corsair, so it's your gamble. Linking because building a cheap gaming PC for friend (1050 Ti), this is more than enough. Could also be used for testing if you suspect your current PSU is faulty.