I scan my own 35mm and 6X7 slides and save them on rewritable CDs and mail the CD to clients. Although digital backs are available for view cameras and scanners are also made for 4X5 and 8X10 negatives and transparencies, the cost of both digital backs and scanners are very high. An alternative is to have a professional lab do the scanning for you. This is what I have done with several of my 4X5 slides, but the cost can quickly add up if you have a lot of sheets to scan. You won't have to worry about digital if you do your own printing and want to submit originals to buyers.
View cameras are for more knowledgeable photographers.
Those who already understand light and composition. If you are more advanced photographer and want to experiment with a new tool, look into view cameras. If you plan on selling your images or just love to try everything photography has to offer, invest in a view camera. Try a simple 4X5 camera and a standard lens. You can find used cameras and lenses as well as sheet film holders.