can't put a price on a good razor blade

recently bought 20 razor blades in a pack for 1.99 in b&m, works out nearly 10 pence  each, worse shave I've ever had, felt like Edward Scissorhands's was let loose on my face, 3 blade razors but quality still so poor, I guess you get what you pay for, have to throw the other 19 away. Don't know why it's so difficult to for manufactures to produce fairly cheap but good  quality cutting blades in this day and age. Moral of the story if you buy a 10 pence razor blade expect a 10 pence shave.