New copy of No mans sky for PS4 is available for £19.75 from the game collection as part of their Black Friday deals.
I know there has been a lot of controversy around the game and I probably shouldn't even encourage sales of it but this is the cheapest I've seen it anywhere yet for anyone who still wants to buy it regardless. Hope it helps someone
It's also available like new for £18.95 if you'd rather avoid giving them another new sale
Next cheapest I can find for a new copy is ShopTo at £22.86