Garage sale - $7000

I have added pictures of the individual ones that have power.

So, I took a trade for what seems to me like a very large collection, but I know nothing about trains. I don’t know what to be looking for of value or how to go about sorting it out. Ideally, I’d like to end up selling everything at once, but understand that it probably isn’t likely.

I would appreciate any insight or advice.

Here are some pictures of what I got. Each one of the bus tubs have probably about 50 cars wrapped in paper towels.