Bottom falling out on pre-emission trucks?

I have a lot of time on my hands, and love old trucks, so I've been checking out Facebook Marketplace, in the "commercial and industrial" section. Now, I'm not advocating FB in any way, nor will I plug up TTR with their stupid links, BUT, as an observation, there are some smokin' deals, for example, in a 500 mile radius of me:
'84 Freightliner CO, $5,000
'74 Transtar $5,000
'84 KW W900 D/C $10,000
'74 352, $6,500( down from $8,000)
'73 4300 D/C( sharp truck!) $12,000, down from $20)
an old '77 Bison, for cryin' out loud, $10g's
'78 Astro $6500 and the biggest wows,,,
'80, 359, D/C $16,500 down from $20
'82 362( another sharp truck) $12,500'
There was even a '62 IH conv.( 400 series ?) tandem( air tag) 190 Cummins, 10 speed, not bad shape, really,, he said it ran great, $1500 BUCKS!! ( I told him it was worth more than that, but he didn't want his wife to know that,nice, hey?)
To name just a few, and that's just near me. A search in Seattle produced similar results, all twin screws all claim to run, mostly BC's, or old Detroits,,So,, my question is, are the feds getting wise to slipping through the cracks with pre-emission trucks? or, are people just not handy enough to run this old iron and save a buck?

 

Granted, the old Cornbinder is going a bit over board, but that 4300 day cab looked like a really nice truck, and the 362 Pete cabovers, were some of the nicest trucks to drive,,,for a cabover. I'm just saying, today, folks are bamboozled into thinking "I'm going into trucking, and I'm spending $247,000 to do so,,,apparently, that's what it takes" and can't understand why they failed. It doesn't have to be that way, I don't think it's a parts issue so much, maybe cosmetic stuff, but certainly no shortage of BC or Eaton parts. You'll see, these companies will eventually drop their "2 year old" truck requirement, simply because not many are going that route and freight has to move, regulations be darned. History has a habit of repeating itself, and I see down the road a piece, outlaws in cheaper trucks will rise again, like in the 80's. You had a truck that passed inspection, like my '72 Pete in the early 90's, they didn't care if it was a '62 Cornbinder, just get going, and I think/ hope that will happen again.

 

HA! 11,000 Schneeder drivers couldn't be wrong. Those trucks hauled a lot of paper products out of the Badger, and I don't ever recall one broke down. I knew guys that wouldn't give them up, until they had to, of course.
I wonder why we get Chinese letters when a FB Marketplace link is posted?