A Marketplace curator will price their work according to how much they think it’s worth.
People can disagree with their pricing and as their the end-user, I guess it’s a fair argument but it’s an argument none-the-less. The creator may see more value in their work then the end-user thinks it’s worth in value and sometimes vice versa.
The best way to make your opinion on the matter heard is via sales figures.
If you don’t like the price of something, vote with your wallet. If nobody purchases marketplace content at it’s price, then it’ll teach the developer to be more aware when pricing future assets / content.
However, the sales could go through the roof and show the seller that they put the correct price / value on their content.
Developers can get angry at the end-user all they like and end-users can get angry at developers for the prices and whatnot but it’s an argument that won’t be won. It’s obvious that both sides feel passionate enough about their cause to make it known but you know, it’s as I said… Don’t shout / moan at each other: End-users, vote with your wallet. Developers, keep an eye on your sales and price your content accordingly 
I think it’s unfair to compare the Unity marketplace to the Unreal Marketplace. There’s so many different factors to take in. Yeah, they are both game engines and yeah they both have marketplaces but costs to develop are a lot different between the Engines. Also, each require a different amount of work and what not.
But again, it’s as I said, argument could go on all day / night and neither party would be none the smarter / better off afterwards.
I think it’s best to just take on board everything that’s been said in thread and both sides of the argument should laugh it off and wait for the real argument: The evidence.
The best part about evidence is that it’s not speculation. It’s not somebody saying “I don’t like the price of , It should be £1!” or whatever. It’s the cold, hard facts. It tells you straight: " is how popular your pricing choice was".
How do I know , I hear you ask? Well, as you know, I give away books for free on Unreal Engine 4 (And offer a small fee for the physical versions). When starting out with them, I could’ve turned to the end-user and been like “Hey, I’m going to charge £100,000,000” for book; But I know it would have been fruitless. Marketplace pricing is one of the only things where too much market research can be damaging as the community is so vast and diverse.
You’ll get the developer who has £10 to their name but want to make the best content possible, And want to get as many things as possible for their £10. In that same community, you’ll also get a developer who has a near unlimited budget and wants to pay top-dollar for top-dollar assets. The answer on “Is pricing working?” will change day to day when asking the community; Hence why the sales figures are the way forward. They can’t be biased.
I’m sure I’m boring you all with the rambling but I hope it helps put at least some people’s minds at ease. There’s no point arguing about price, It’s down to the developer to set the price and learn from the sales statistics.
