Look on mautofied.com. It's a website that only does modified vehicles. I've seen a couple WJs sell for $20,000+. I had a bunch of offers on there when I sold my dub, but most of them wanted to trade me for a lowered S10 or a four wheeler plus some cash. I ended up giving it away for five large to some goofball who found me on Craigslist.
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March 2014 GCOTM. 1998 Deep Slate 5.9
On the Jeep:Hot intake, 52mm TB, Summit 8mm wires, catch can, 703s, insulated fuel rails, indexed Champions, Bilstein 4600s, Eibach lowering springs, Moog SS, Ironman mounts, Lotek 2GP, lots of gauges, sparkly paint.
In the garage: M1 4bbl
In the works: Addco/Hellwig sway bars, nitrous, full polly bushings, full exhaust, data logging, billet UD pulleys