SHORT ANSWER

Farming equipment has become vastly more complicated than it was in

the past. This is great because these amazing machines are much

more capable, but they also require specialized tools and diagnostic

equipment to keep them running. Most farmers are quite skilled

mechanics and would like to be able to purchase these tools in order to

do their own maintenance. Many manufacturers, though, refuse to sell

these things to the farmers, requiring instead that the farmer pay for a

factory trained mechanic to do the work. Making use of what we have

discussed about price discrimination explain why the manufacturers

want to this.