I have quite a lot of leisure time at the moment so I decided to try a mini experiment.
I bought a one kilo pack of chicken thighs from Sainsbury. I think thighs are really good value. Actually, without the tray they weighed 1150 grammes so I was ahead by 150 grammes before I started!
I then boned them and resulting the flesh and skin weighed 1040 grammes.
Then I removed the skin and fat and weighed the meat. 850 grammes. They had cost me £1.95. That means that skinless, boneless chicken fillets had cost me £2.30 per kilo.
I checked the Sainsbury site. They sell chicken thigh fillets at £5.31 per kilo. More than double!
And I got a small pan of stock as well.