Welcome to the forum!
The "Long Wheel Base" Wrangler is often referred to as the "LJ", or by it's official name, the "Unlimited" model. It was only manufactured from 2004-2006, and typically they sell for more than the short wheel base TJs. In recent years, clean LJ Rubicon models with low miles in pristine condition have sold for well over $30,000, and started to become something of a collectors vehicle.
The LJ has a few benefits over the TJ.
First off, the longer wheel base allows for less extreme drivetrain angles when lifting it, so you can get away with a larger lift without having to do things like a
Slip Yoke Eliminator (SYE) or transfer case drop.
Secondly, the LJ has considerably more interior space than the short wheel base TJ, which is great if you like to haul a lot of stuff on your trips. The trunk is noticeably bigger than the TJ, which is a big plus.
The disadvantage of the LJ is that with it's longer wheel base, it's more likely to get hung up on large rocks and such when rock crawling, though this is not an issue for most Jeep owners, unless you plan to do some really serious rock crawling (i.e. Johnson Valley).
That one you linked to looks clean, and assuming it's been a California vehicle it's entire life, you shouldn't have to worry about frame rust, which is undoubtedly the biggest thing to look for when buying a used Jeep Wrangler (stay far, far away from ones with rust on the frame). In addition to that, the price is right as well.
I think it really comes down to preference in all honesty. If you want the extra space, go for the LJ. If you like the look of the shorter wheel base TJ, go for one instead.
Check this thread out so you have an idea of what to look for with used Wrangler TJs and LJs:
What should I look for when buying a used Wrangler TJ?
And as always, feel free to ask as many questions as you want. There's a great bunch of folks here who are always very helpful, and extremely knowledgable.