Without knowing the costs of actually getting a boxed game made, and put on a stores shelf, its not possible to say if the price was or was not too high.
The more hands that touch the product the more expensive it ends up.
And you had demo's of games on magazines to try before you buy.
At the end of the day nothing is cheaper than free.
I was never into Amiga games that much anyway, most of my software was applications, most of which I got on cover disc, some of which I upgraded: eg Wordworth Office, Cinema 4D, Art Effect, Photogenics, ImageFX. Brilliance 2.0 I payed full retail for.