Best value razors are made my Boston shaving co and sold by boots under hydro brand.
Gillette brands (including Wilkinson) are made to wear out/block after after a prescribed amount of uses per blade and are 100% gimmick.
They actually developed a coating which increased the razor life by a factor of 10, this added about 0.035p per blade but would cut overall sales due to the improved performance.....
The cost of the blades to make and assemble is less than 1p, the holder is less than a pound.
The Isleworth plant made in excess of £100 million before it was shipped to Poland by P&G as it was easier than shutting the under performing Berlin plant.
Expected 5 year turn round on the move was around £600 million