If the Land Cruiser is in excellent condition, like good paint, no rust, good tires and mechanically sound, he might get $1500 tops. If there is body damage and it needs tires, I wouldn't give more than $1000, probably less.
I have an '87 Mazda pick up that I doubt I could get much more than $500 dollars. Because it is a Toyota, he can get a bit more. The thing is the age. Again, if it is mint, then it is worth more.
Go to
WWW.KBB.COM to get the Kelly Blue Book value.