Will many 1970's tractors become collectable: 4630, 1370, 1586, 7080, 2-155, 6030? Big iron like those require big trailers and a big shop. In the 1980s the number of farms dropped and the number of new tractor sales fell even more sharply, I'm not sure many would be collectable. What 1980's 1990s tractors would anyone here want to collect?
I was born in 1985.
Future "hot" tractors are Deere 50 and 55 series, IH 88, Case Boxcars, Ford 30 series, Deutz Allis 9790, MF 2805, the last Whites, etc... THen I could see someo ne collecting the first of the Deere 7000, 7010, 8000, 8010. Basically all tractors with not too much electronics and not too much plastic will still be collectable, but by a much smaller number of people, because less people like tractors.
On the other side, a rich man needs to buy all the piece of junk ugly more recent tractors like the MX Magnum and the like and crush them with an hydraulic shovel so they disappear from the earth face....
"Difficulty" with those tractors from he 80s and 90s is that they are still run a lot, and they have many hours. Finding non worn out ones is difficult.
Here in France, finding older tractors from the 80s in good shape is just impossible. They all have been sent to Eastern block farms during the early 2000s. That is because dealers wanted to get rid of the extra userd tractors to sell more new ones. That is where the states are doing better. Very few tractors are exported when used.
Finding a Fiat 160-90 or Fiat 130-90 (quite the collectible tractor if you have never driven one), a Renault 155-54, Fendt 615 LSA, Fendt 818 Turboshift, Ford 8830 or a Genesis, is just very difficult. Most of the Deere 50 and 55 series have been shipped to eastern Europe or sent back to USA.
Myself, I choose to sold the 4020 I bought 20 years ago to get a 4050 MFWD. I did not have to put any extra money into the 4050 with the 4020 sale. It is really not because I think the 4020 value is going to be lower and the 4050 is going to go up, it is really because I think the 4050 (466 Turbo Powershift MFWD Sound Gard cab, AC, etc...) is much more tractor than the 4020. Plus I have too many 20 series and I like a lot the Deere 50 series. 55 is still too much money, plus I am still not ready nor rich enough to afford some of the electronics sensors that go with them.