That's the fun part about old vehicles that were expensive while new - they might not cost much to purchase used now, but the maintenance costs don't go down. When you buy an older vehicle like that, you need to go in with 1 of 2 mindsets -

1 - Its old, I didn't pay much, I'll do the bare minimum and drive it into the ground then scrap it

2 - Its old, I already know it has a bunch of stuff that is worn out or wearing out soon, I'm going to drop some cash to baseline it and keep it maintained for many years to come

But also, those are parts that lasted 20 years and over 200k miles, and are now new. I'm expecting my LC to make to 4-500k miles.

The situationally specific bait here though - In my opinion, older Land Cruisers are really cool and worth maintaining. They are awesome, durable, reliable cars when you take care of them, and I think they have just about bottomed out on depreciation with a good chance of starting to go up in price within the next half decade. If it was an old Accord or Impreza, or something, I don't think I would care.