Many years ago there was a young bloke in an appliance store, as the customers came in moaning that something had broken, stoped working, he would spend how ever long it took to tell the customer how to fix the problem, and sell them the parts to do so.
The boss watched him deal with 2 or three costomers then called him into the office and fired him, for not selling new appliances.
The kid then explained how his idea worked, the customer bought all the parts to fix it themselves, sometimes they needed a special tool.
They left the shop very happy.
Next week they were back and bought a new appliance ,the old one was well stuffed by their attempt at repair, still with a smile because the young fella had been so helpful in the first place.and they told all their friends how helpful the young bloke had been. Increasing the shops reputation.
The boss rehired him and gave him a pay rise.