I love my JK, but still looking for a project LJ such bad ass jeeps. WAL is 100% correct they ain't cheap and good ones hard to find.
I found mine last year in the high teens with some good mods and under 50k miles. I couldn't pass it up because though I wanted a JKU for my family and three kids this left me a lot more money for more mods since a similar condition and mile JKU would have been pushing $30k. Plus I always loved the scrambler and the look of the LJ...and I'm a 4.0 fan. The extra room is great with the kids too and we all fit! I built an off road trailer with roof tent for the summer and for camping so that hauls the gear on longer excursions and the LJ has the higher towing capacity so it works well.
It's got a 4" lift and SYE on it. I have added discos, tranny cooler & gauge, Novak TC cable, engine/tranny and other armor, cromo shafts and just got 4.88's and ARB's F&R. And a ton of accessories of course too from lighting to CB. So of course 35's are next now that all that's done.
Anyway, even though they are more than a comparable TJ, if you are looking at JKU's an LJ could be a cheaper option and you could still have a lot of room for mods as well if you were looking at spending JKU money. Just for example I am still WAY below a similar miles and condition but fairly stock JKU price with all of the aforementioned mods...and that includes lockers and regear etc.
But yeah, finding a nice or lower mileage one can be a little more challenging than a TJ. They're out there though. A guy here in Denver specializes in them and sells them nationwide (and he has other models too but specifically hunts for the nice LJ's). He's at
www.dreamjeep.com
Parts galore and most cheaper than JK stuff. MOST TJ stuff is direct swap except for some obvious rear body panel stuff and of course all models of the LJ's have the D44 rear...but that's no disadvantage! Find one in a Rubi and that's even better.