How about a "Wish List" so that people can choose any number they would like and then buy them or download them at another time with out needing to pick and choose them each time they come back for a purchase?
Yes I love this feature on shops.. It's a good idea to save the current cart products as a "wish-list"..
Also I propose a product filter like a left side menu where you pick (from a drop-down list) the manufacturer, the price range, a product color (for example) etc.. (and from the administration to be possible to add these filters).
Yeah I go back and forth thinking of which products I need in what order and do all these calculations then when I sign back to the unity its all gone. Its so sad. lol. I think this is a great idea and shouldn't be too much trouble to implement. But I'm no programmer.
Also I propose a product filter like a left side menu where you pick (from a drop-down list) the manufacturer, the price range, a product color (for example) etc.. (and from the administration to be possible to add these filters).