I just quote you from above
’ is a very basic map pack with small landscape materials.’
Following the post, you did not even get the texture tiling right…
You do realize, that designers in large companies only get that amout of money, because the games/software using their landscapes generate millions in revenue.
Once you are in that position, you can ask for that amount of money, and you will get it.
It is safe to say however, that everyone who purchases the landscapes on the marketplace is not working on such revenue generating games, and is not at professional level, otherwise they would have the ability to create such landscapes themselves. Therefore is is just completely unjustified to ask for AAA company prices here. It is a simple market driven principle.
But go ahead, offer them for $50. UE4 is still young enough to get away with prices like that. It is a good opportunity right now to attempt .
Regarding doing landscapes in UE4 yourself:
The largest amount of time goes into setting up the pipeline from world machine (or other landscape software) to UE4. Here I buy the 10 hours. Once the pipeline (workflow) is set up, it is never going to take 10 hours. No way. It will be a matter of 30mins, in that range.