Must be Hemi conversions.
Hemi conversion by a local shop here, is only (ONLY.....yeah right) $24k
By doing it all yourself you could save a ton! The engine itself will run you $10k (with wiring/ECU) and then you've got to make it work with the Wrangler harness and gauges. While that's a boatload of wiring madness, it IS going to cost you $5k or more to have someone sort the gremlins.
So if you take the current market for a 5 yr old rubi (+/-$30k) and buy a crate hemi ($10k) and pay someone to put it in ($5k) and then add all the farkles that is in the CL ad (lift/wheels/fenders/bumpers/winch....+/-$10k) you're saving $10-$15k
But do you really want $50k+ buried in a JK?
I'd rather have a dedicated buggy build for $25k and a tow pig for $20k and $5k for fuel and supplies for trips thruout the year