toyota made a reg cab 4x4 4cyl version of the tacoma up until a year or two ago, it didn't sell well as almost everyone bought extended or double cab trucks. now the reg cab only comes in 2wd and almost everything is extended cab or 4 door. does nissan even make a reg cab truck anymore?
i thought the same thing, had a 96 reg cab 4 cyl 4x4 hardbody for about 4 months. problem was the cab is so small that i couldn't straighten my legs, and the lack of cruise control meant that i walked all funny after a long drive and my knees hurt.
Nissan hasn't made a reg cab for several years. I bought my 2003 Kingcab for $10K new. It replaced the 2000 regular cab that I bought new for ... you guessed it, $10K. I just can't bring myself to pay $20K for a base model.
BTW, cruise is a relatively easy add on in most instances.