Same opinion here. It's still a TJ with probably crappy HVAC fans and whatever other issues a TJ has. It's a great looking rig but $20k seems high-ish. Probably worth it but I'd be super interested around $14-16k. There are some pretty basic TJ in that price range though, so I see where the owner is coming from.
I had the opportunity to drive a pretty stock 35" tire, 4.0L/5 Speed TJ on the Fins and Things trail last weekend. SUPER fun to have that opportunity. Great little rigs. My son's '97 with 4.0L/auto on 33" tires with 4.10 gears is pretty fun to drive as well.
I’ve only had the opportunity to do a few trails in Moab in my second to last TJ. It was open diffs and short arm on 33”s. Fun rig for sure, but at 20k I think I’d rather it be a 4 door jk or even an LJ.