You'd think nobody builds fence nowadays, until you try to buy good used posts.
I got a ton of old fence posts a couple years ago.
Friend had the wire down already, and asked if I could come use my puller to pull the posts and T-posts, and stack them. He said he'd find someone else to haul off the mess.
That fence had only been in the ground for less than 2 years. I told him I'd haul it off for him for free.