How Money martial arts?

Martial Arts vary in price, I first did martial arts when at university it was only £1 per 2 hour class the Black belts Peter, Bob, Craig and Amy taught to a very high standard and discipline for free the £1 was to book the hall from the university I have yet to find a martial arts class taught to a similar standard and paid up to £5 for 1.5 hours. Peter, Bob, Craig and Amy all moved away with there careers so no longer , the last I knew , run the Blue Dragon Tae Kwon Do class.
You can buy some training aids but they aren't needed apart from some personal protective gear at some clubs that isn't expensive