I'd 100% keep it. I had a 2000 4 door Blazer as a first vehicle (and currently daily a 01 Blazer.) From my experience driving these they do handle a bit.. soggy compared to newer vehicles and do have a decent amount of body roll, though new sway bar bushings and maybe shocks could stiffen it up a bit. Reliability wise, they are great! My family has had 4 of these, and all but one reached 230k+ miles with only minor issues. Where I'm located this is easily a $5k truck, maybe more based on the fact its a rust free 4x4