I bought my '88 in 2018 for $8000 which is around $10k today and it was a driving project that needed most things and about $15k in differed maintenance/mechanical restoration. I see marketplace project specials go from $6-$12k. A driving and mostly sound one
I would start around $15k. Some folks have told me mine is worth mid-20s with the interior and mechanical restoration I've done, I'm skeptical since it still needs body and paint.
Bring a trailer can be useful for market snapshots:
Land Cruiser 60-Series - https://bringatrailer.com/toyota/land-cruiser-fj60-fj62/ That outlier LS3 one for $153k is ludicrous though.
I will also echo that doing some light repairs will be well worth it to get the maximum sale value from this. This isn't a beat Chevy Lumina we're talking about here and most dollars in break even at the very minimum barring major off road modifications.