The whole price thing comes down to 1) is it something you need to complete a product and 2) is it less expensive than it would cost you in time and software to learn how to, then do it yourself. If either answer is no, well then do not buy the asset.
The only problem I have with the marketplace is it is pretty empty, and I keep reading threads about new things that are headed there, or should have been there, but are not. Not saying it needs 1000’s of items, but a lot more that what is currently there would be nice.