For a buddy buying/building/selling is almost a disease, in the 20yrs I have known him, he has gone through 16 rigs, which range from slightly modified stock to custom built Rangerover on portals, and includes a '14 Rubicon that he wheeled for 6 months before got tired of wheeling something he was making $700/month payments on. Only one, the Ragerover, was totaled, everything else was still a clean daily driver when he sod it.
I have my original rig I bought in '90, and my '91 I picked up in '05, however to satisfy my need to build something new, or try out new ideas, i just buy a rig headed for the scrapyard, restore and mod it. This way I am never w/o a rig to wheel, nor in the hole after selling a rig.