Well 4x5 E-6 processing is pretty dear at labs that still do it. I have a stash of 100 or so sheets of expired EPP bought at the last phsc camera show, and slowly I shoot a sheet or two whan I have my crown graphic out with me. I think there are perhaps 8 sheets on the shelf at home in the darkroom waiting for the next time I mix a litre of e-6 chems.