I always make a slide show using either Flip Album Pro or Pro Show Gold. With Pro Show Gold you can burn the show to DVD if you want to. I always try to get my clients to view the images the first time at my place. My monitors are all calibrated and they can see the images the way they are supposed to look. Your average Joe's monitor is usually way too bright and who knows where the color is at. I always explain the difference to my clients. As far as pricing, that's kind of a personal thing. I don't sell the cd slide show by itself, but if they reach a certain price point on print purchases I make it available for $25. By the way, make sure the cd is low res and encrypted. Hope this helps!
(Image would have gone here, but you can't do that now that the right click is disabled! Please rethink this move!)