Okay, well first off, a Rubicon for 13k is a hell of a deal, in fact it's a STEAL! I paid 20k for mine with 60k miles on it, and they sell for 20-25k all day long here in the PNW, assuming they are clean, low mileage, and rust free.
Now, I will say that if that the number one thing to look for on a used TJ is a rusty frame. Given the price point and the fact that it's in VA, I'm pretty sure that thing is rusted, in which case that price would be too much.
No one here can tell you if that is a solid buy without seeing many more high resolution photos, particularly of the underside. The mileage is good, and it looks pretty clean from the outside (minus those ridiculous looking YJ esque fender flares).
A rusted TJ is not something you want to buy, and these things are notorious for rusting. When sellers don't upload photos of the frame (or other high resolution photos), I immediately assume they are hiding something. Don't bother going to look at it unless it's either close by, or you can get good photos of the underside. A TJ with a rusted frame isn't worth anywhere near 13k if the rust is bad.
I'm also always weary of heavily modified Wranglers. You don't know who owned it, what they did with it, how they wheeled it, or what quality of parts they used. There's a big difference between a modified Wrangler that uses high quality parts like Currie, Savvy, Metalcloak, etc, versus one that was thrown together with a large body lift, coil spring spacers, Rough Country or Skyjacker lift kits, etc. The latter are considered cheap, lower quality parts, while the former are considered expensive, high end parts.
Can it be a daily? Sure... As long as you don't mind the worst fuel economy you'll ever get in your life... seriously. If you can deal with that, then you'll be fine daily driving it.
Don't go off KBB for Wranglers, it's usually very inaccurate. The Jeep Wrangler is consistently ranked in the top 5 highest resale value of used cars, and it's true. Clean ones without rust (which are harder to find, but out there) will be upwards of 18k at least with low miles and Rubicon trim.
Oh, and check out this thread as well:
What should I look for when buying a used Wrangler TJ?
