What's the single greatest problem facing humanity today? If you said "finding good, low-priced used Mazda Parts," well, I have to tell you that you're wrong.
Sure, finding good cheap auto parts online WAS a problem, but it's not any longer, because if you just go to quality auto parts.com,(or, as the net puts it, www.qualityautoparts.com) you can find and order parts for your car or truck online and save tons of money. Which can be handy, in a couple of ways. Or a three-ful of ways:
First, it can be handy if you're a fixer-upper kind of guy: you know what parts you need and you know how to put them in, so why pay premium prices? Getting them online is cheaper and cheaper is better.
Second, if you use a mechanic, you can order the parts yourself and avoid a hefty markup on them: Again, cheaper = better.
Third, if you get your auto parts online, you'll not only get the right part cheaper, but you'll have a working car for when the Earth must face the ACTUAL greatest problem facing humanity:
Giant Rainbow-Colored Man-Eating Radioactive Space Kitten.
(No, I don't know how a car will help you. But it can't hurt.)