As far as value, that can vary depedning on where you live. A RWD model will obviously have less more value in "sunshine states" than say areas where they see more snow and 4WD is more desirable in an SUV. Your best bet is to use sites like
www.NADA.com or
www.KBB.com to determine your vehicles value, although, KBB can be a little generous is their valuations at times.
The good things about a 2002 Pathfinder 2WD:
-the 3.5L V6 provides plenty of power and has no timing belt to worry about.
-it has the updated rear suspension (changed in 99.5 model year)
-good ride for an SUV
-the lack of transfer case and front axle gives you a lot of room under the vehicle and is easier to work on
The bad things about a 2002 Pathfinder 2WD:
-some of the VQ35DE engines have had their power valve screws fall out and cause engine damage. This can be prevented by removing the upper plenum and applying threadlocker to the power valve screws.
-there have been some rust and rot out issues at the bottom of the strut towers, so make sure the vehicle you are purchasing is in good or repairable condition and the recall is performed
-upper and lower rear suspension link bushings are common failures on R50's, causing the vehicle to wobble or wander at highway speeds. Replacing the links sometimes calls for cutting through the bolts as they rust to the inner sleeve of the link bushing
-there have been a lot of check engine light problems on these R50's compared to the VG33E equipped, earlier models. Oxygen sensor codes and intake valve timing control codes are not uncommon. There have also been some ECM updates.
-ignition coils have been know to fail, but aren't always easy to identify if a specific cylinder misfire code isn't set.
-lack of 4x4 can hurt the resale value, if you choose to sell it later.