The asset store should have an automatic way of reading and parsing the packages to allow users to view detailed info about various assets.
Basically you should be able to do something like the current "Package Preview" option to browse the package, and view:
- number of trianges and vertices of a mesh, number of UV sets, if it has normals or tangents built-in or not
- details about textures: size, type(normal map, cubemap, etc.)
- sounds: format, samplerate, number of channels of the audio file (the original file used not the unity modified settings, for example a stereo file but setup with a "Force mono" in the package)
- materials: a snapshot of the offered input parameters and details about how many texture inputs, etc.
...and more if you can please extrapolate on this idea.
I'm really surprised this hasn't been done so far.
There are a lot of packages that post in the description a number of triangles saying for example they are low-poly and in fact, after purchasing the package, they prove to have a much higher poly-count than stated.
And there are the other packages that don't post any metrics about the assets offered making it even a riskier investment.