My questions are..
1) what's a good year and mileage to look for?
2) auto or standard for daily driver with the occasional trail ride?
3) what's a good price to find an unmolested stocker with zero rust?
4) do they need a regear to keep decent fuel mileage with 30s or 31s?
5) what model is it when it doesn't have all the plastic crap along the bottom of the unit!
1) I prefer the 92-95 4 doors. The 91 4 doors had the 1.6 8V (not a powerful enough engine for a 4 door, IMO). The 96-98 4 doors are OBD2 and I don't really care for OBD2...just a personal preference. 96-98s did have airbags, if that makes a difference.
Around 100K would be nice. But good luck finding one with that low of mileage. You are probably going to find them with 150K+. These engines are capable of running well over 200K, but it all depends on maintenance and how they are driven.
2) I would go with a 5 speed all the way. You will get a little better MPG with a 5 speed and I like being able to control the shifts.
3) Depends on the market in your area. Pretty much all of them are selling over blue book value, so don't be surprised by the prices.
4) A regear wouldn't hurt. Your options are 5.38s and 5.62s. Both of which can be kinda hard to find (they were both only made for one year).
5) The ones that have the plastic along the bottom are the 96-98 sidekick sports. They also have a 1.8L engine. I would stay away from them...limited used parts availability and the 1.8s are bad about eating timing chains and valves, if the proper weight engine oil isn't used.