Gonna be real here man, this is the cheapest 6" lift on the market... I would buy new so you can have the warranty. If you must buy used, find a nicer lift like procomp or BDS or fabtech.
doesn't get much cheaper than a new RC lift. But there are a few disgruntled people who have recently decided to remove their RC lifts, send them a message.
here is one, there are a few more if you scroll through the suspension pages
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