Hey, welcome to the forum, and good luck on your search.
If you're looking for it completely stock, take a look on the underside of it to see if it's rusted/ dented from offroading. if you plan on upgrading the size of the tires, try to look for the rubi, because it will have the dana 44 axels which are stronger, and can handle the weight of the tires better.
The Rubi's springs are a bit stiffer, giving it the appearance that it's higher than the other models, but it isn't. It just hasn't sagged as much.
Also, make sure that nothing is leaking underneath, and nothing is cracked.
Other than that stuff, it's all personal preference.