Put it to them this way. You go to buy a car. Do you want to buy a civic that is cheap and just gets you where you are going, or do you want a Cadillac that does the same thing but is more luxurious, has more power and features etc. You get what you pay for.
It's a hard thing to get most people to understand.
There are tools that "can do a job" and there are tools that "make the job go so much easier and smoother".
Harbor freight tools are wonderful for me, the screw drivers and wrenches and sockets and everything else I got in my tool back has served me very very well for the money spent.... but those tools don't earn my living, they aren't even getting hobbyist usage. I used them a decent bit back when I did repair on arcade machines, but lately I haven't messed with that. I'll pull them out every once in a while to do the odd job around the house.
Would I touch those things with a ten foot pole if I were swinging a wrench for a living, HELLLLLL NO!
Sure, that $249 laptop from BestBuy "works". You can get online, you can install M$ office, it's a "usable" laptop. Try streaming 1080p video on that thing, if the screen resolution even allows. Try using something like quickbooks on that. Try gaming outside of solitare and minesweeper. Even trying to multi task when doing "light" usage things will bog that system down.
Most have 2-4GB of ram, and 2GB is just plain unusable. Most of those $249 specials have pathetic processors. Can you get online with them...... sure if you have a few moments. Can you run quickbooks? If you like "slideshow" performance, I guess you can.
The real key to it is to find something the person can identify with. You have to put it into terms they can understand, often times just making that connection on a subject you both understand will make more of a difference then them actually understanding what your trying to tell them.
A car guy suddenly realizes you know a little bit about cars, and now he talks your ear off for twenty min before he agrees with what you were just trying to tell him.