It is really iffy and im sure you can find a great second hand one. The do last a really long time, My 01 TJ has about 400,000 Km on it, and runs great. If you are looking for a used one i would suggest finding one that has been taken care of by a Jeep enthuist. This may make it a bit more expensive, but more often then not you can find a wrangler that has been well maintained with a few upgrades, such as lift kits, tyres, and lighting. My suggestion is dont rush into it. If you want to save a few bucks, check around on the internet daily for a few weeks, or months, till you find the one that fits your needs! Best of Luck