Kelly's Heroes Tigers sell legit for $1000 without trying. I think Matt just sold one on his site for over a grand. Ebay I think the last one sold was higher than that. Certain items will always bring money.
It also depends on who is selling and the time horizon they have.
What is not going for crazy money is just any retired piece. Put an Honour Bound Sherman or Tiger up Gold or not and it will not last long. Neither will early First Legion Vehicles and of course certain K&C and Figarti ones.
Put an Aeroart PB Knight with large flag up - goes from anywhere $1500 to $2500.
Just all depends on the piece.
Tom