Hello,
Some raise prices and others lower them. Some have ridiculously low prices and others have been forced to raise the price. Each one is free to sell their models as they wish and I think that's the way it should be. But it is the buyer who decides whether to buy a model or another. If someone raises the price of a model and continues selling it, it is that it was selling too cheaply. If you do not sell it, the price will go down. You can also negotiate the price directly with the seller. For example, this month I accept 50% offers.