Equally there are resin cast models that are being produced from molds that are well past their sell by date, so not all is rosy on the resin cast front
But you miss my point - How many new Gn15 steam loco kits do we see being produced by these people ?
So far I only received very crisp resin and whitemetal castings from sellers. Some companies only offer limited runs. e.G. 50, of their castings and still are sold out quickly.
I have no idea how many Gn15 model were produced and sold. I have seen quite a few built Smallbrook resin models around. Steve Bennet wrote at Ebay, 34 of his DECADE locos (not a steam loco) where made.
So if the printed models seem not to sell too well, its probably because of poor marketing and advertising.
45 years ago, when I worked in the trade business, I learned, you have to bring money if you want to make money.