I agree with Becky that buying outdated film on auctions is not worth the money. I still have a couple of Fuji Reala Ace 220 in the fridge, that has been a favourite. I have shot very little Portra, honestly I do not like it a lot. Maybe it's the way I expose it that's the problem. I will probably give it a go once more. Getting 220 colour negative film processed is not a problem here, but the last shop in this country that processed slide film has now stopped doing it. So the alternatives for slides is sending it abroad or doing it myself. In most situations using 120 film is ok, but sometimes your motif will be gone while you're busy changing film. As for film backs I'm lucky enough to have several cameras that will take 220.