The problem with these models is the manufacturers do limited runs of them and then that’s it. I had the same experience when I started to buy some models a few years ago, I was bidding on a Dick Johnson Shell livered RS500 touring car by Biante which iirc went for well over £200 and that was quite a few years ago

With anything that is not available it fetches good money on the bay so it’s a matter of how badly do you want it sort of thing. (I wouldn’t pay £400 for a toy either) not unless you could sit in or on it and drive/ride it

If you ever travel abroad and come across a model shop poke your head in there as I know of people who have bagged a bargain and found rare and sort after models in this way