Since you’re asking on a very Land Cruiser bias forum. The majority of people will tell you these things never depreciate, don’t even get broken in until they cross 1,000,000 miles, are wired better than aircraft, ….
Your depreciation question is a tough one. Much of it depends on where you live, is there a large cruser following in the area? And what the future holds in terms of economy and people’s willingness to pay >$30k for a >10 year old truck that gets 12-14 mpg.
Also, let’s be honest it more than 10 years old major things could go wrong (even with a 200). Does it have the new updated radiator?
If I have to commit to my guess I’d say best case scenario you lose $2k in depreciation. Worst case scenario you have to replace the radiator, water pump, idler, head unit, and do a top end rebuild. And are out $10k and take another $6k in depreciation.
Last thing I’ll say when it comes to vehicles is buy one as least often as possible. That is whatever you buy plan on driving it for at least 10 to 15 years. So based on what I know and have learned (in buying and selling cars for >30 years and selling Porsche for 4 years) buying a cruiser when you want a tundra is not a smart financial decision.