I will never quite understand the collectable values of model trains. In the last week, I've paid $500 (including fees) for a model that regularly goes for $1200, and sold a model on an offer for $1100 that I paid much less than that for not 3 months prior. The $500 model was a sought after brass loco, and the $1100 one a 'common' RTR plastic model.
End of the day, the value of a model is not what it costs or what it sells for. It is how much enjoyment I get out of it whilst I have it/whilst I am alive. GT3 is a model I have wanted for a long time and was looking into options for once I came back into the UK scene after a break, and the Consett Iron Ore wagons are another. I model British to enjoy my modelling as well as modelling Australian seriously. Only one thing truly matters: