Looking to purchase a Canon film camera to use as a second body when shooting high school sports. Currently have a 50D and use the 200 F2.8 and a 300 F4 prime. Whenever I see these sold as used I rarely see the number of rolls of film that have gone through the camera. Do any EOS 3 or 1V owners out there know if someone besides a Canon Service Center can determine this? Descriptions always seem to only mention cosmetic condition of camera for sale. I'd hate to buy one used only to find out it's 10 rolls shy of its shutter mechanism limit. I live in NJ so bringing to Canon service is not really a big deal. Any help would be greatly appreciated as would any other opinions on these 2 cameras. Thanks.