I already have a loader and developing reel and tank. However, while the cassettes are reloadable, they are not infinitely reloadable. Similar to 35mm cans, the felt becomes matted, etc and the "spring" of the can loosens. Eventually light leaks develop. So while I have a stash of decent "users", they probably won't last me through the bulk rolls of film I already have. eBay is an okay source for them, but there's no guarantee they'll be light-tight and it's tough to really judge their condition without shooting a few rolls through them. I have beautiful cans that look new, but leak like a sieve.