I agree with this completely. My brother works at a Ford dealer on transmissions and he said the same basic thing. My clutch pedal will get hard and not engage if I drive the truck over about 45 minutes. So I just use it around town until it breaks more. To redo the whole clutch, master/slave cylinder and everything involved would be over $700. The truck has 202K miles on it. So if I am going to fix something in there, I'll do it all at the same time.
When I bought this one, it showed less than 20K miles on the odometer. I was young and didn't check it out well because I liked the way they looked back then. When the brakes started acting up, I took off the tires and saw that the rotors had a deep gouge in them where the prior owner had not replaced the pads and ground metal on metal for a long time. The guy I bought it from had only replaced the pads and they had a corresponding raised area.
It also had a fuel pump relay issue that was probably just Jeep at the time. I didn't learn my lesson and traded it in on a new 92 Wrangler that I had for less than a year due to finances at the time.