san antonio fj previously said:
85 86 87 60's are more valueable than 62's
It's perceived value.
They're more likely to rust, the carb engine can be a PITA if not maintained, and their general age and application usually means they've been through the wringer a lot more than 62's.
The 40's have style and the timeless "Land Cruiser" look going for them, the 60's need an assload of work to be deemed more valuable than a newer, cleaner, more reliable, less rusty, and overall sharper truck.
They are a nightmare to restore, too.