Bundled kits like that craigslist listing almost never get the asking price.
Seller would be way better off selling the desirable kits individually and would make double the asking price.
Some of those would go for $100 here.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !