The saying that you get what you pay for is easy to take for granted, because often 1 doesn’t have a choice.
If all you can afford is a used vehicle with several mechanical complications, it’s not enjoy you can pull more money out of thin air to get a more reliable vehicle.
You’re buying something that you suppose will likely give you trouble, however it’s the only money that you have. I had friends in the past that despite being well rounded people, they grew out of economic privilege. Occasionally they took for granted that they could always afford the best regardless of whether or not they were buying groceries or appliances. If you’re in a position where you can afford it, I can’t imagine not taking luck of the opportunity. Even though my income is absolutely limited these afternoons, I spent every extra dollar I had when I needed a current central a/c. The last a/c I owned was in this condo for over 15 years before it finally quit working. Not only did I want to get something at least as good as the outdated machine, although I wanted a definite upgrade as well. One number to look at is the SEER rating on the particular component plus its manufacturer. The SEER rating will tell you how much cooling output an a/c is capable of given how much energy it needs to reach that level. If you get an a/c with a high SEER number, it means the a/c is seriously energy efficient. The more energy efficiency an a/c has, the colder you can get your cabin while spending the least amount of money to get there. I was seriously fortunate that I had just enough money saved to get an a/c with a high SEER number.