I have these for sale:
Antec VSK-4000B USB 3.0 Mid Tower PC Case – Bought from Scan Computers 4 December 2017 £22
In excellent condition just two of the covers removed for a two slot video card
I have the original box for the case so shipping not a problem
Corsair 450 Watt VS450 Refurb ATX PSU/Power Supply Unit – Bought from Scan Computers August 2017 £25
Plus delivery at your cost,
Edit to include cost of case.