Even if you could buy a complete set of parts to rebuild an 80 from scratch, you could *never* buy the parts at the same pricing that Toyota would if still making 80's today. Remember Toyota's manufacturing systems are very tightly controlled and when you're buying 10, 100, 1000, 10000, 100000, 1000000, or 10000000 of a single part over the course of a multi-year manufacturing run (including inventorising a certain amount of spare parts stock for future-proofing) the cost of an individual item is very small.
Even complex assemblies like motors are very expensive to buy as a one-off new part, but how many 1hz diesel engines has Toyota produced during production of 75's, 80's, 78/79's, coaster buses, and other vehicles that 1hz's were put into? Whereas a crate 1hz might cost $20k to buy now from an OEM parts supplier like Amayama, or even direct through a Toyota dealership, if you're making (or getting made) millions over a production window of 30 years, the per-unit cost is a lot lower.
On a related note, an 80 series if still made today would be considered a luxury vehicle here in Australia and attract 'luxury car tax' so keep that in the back of your mind when thinking about supplies of OEM parts. Current LCT threshold here is A$76,950.
Even complex assemblies like motors are very expensive to buy as a one-off new part, but how many 1hz diesel engines has Toyota produced during production of 75's, 80's, 78/79's, coaster buses, and other vehicles that 1hz's were put into? Whereas a crate 1hz might cost $20k to buy now from an OEM parts supplier like Amayama, or even direct through a Toyota dealership, if you're making (or getting made) millions over a production window of 30 years, the per-unit cost is a lot lower.
On a related note, an 80 series if still made today would be considered a luxury vehicle here in Australia and attract 'luxury car tax' so keep that in the back of your mind when thinking about supplies of OEM parts. Current LCT threshold here is A$76,950.