Got my:
New 20D from
Adorama - they held up my order under the pretense of needing verifcation by phone, then used that to try to sales-pitch me on additional items and insurance.
New 40D from
Ebay - no fuss, no muss, no problems, but I was worried up until I got it that I'd get ripped off somehow.
New 7D from a camera shop in Chattanooga, TN - Got it "home" (a motel I was in that was 50 miles away), charged the battery overnight, and the body failed with an error. Took it back the next day, they promptly replaced it, we tested the replacement in the store until I was satisfied. Would have been a huge problem for me had I bought it online and had to go through a rigamarole to return it and all. I was glad I could just walk back in and say - "fix this problem I'm having", and they did.
New 5DMKII from a camera shop in Nashville, TN - I walked in for a new umbrella. I walked out with a lot more, including this camera and what is now my favorite lens, a 24-105 L. Used my phone while in the store to check prices online, and the store matched the lowest, so I took the plunge, and was very pleased. I was also thinking about the dead 7D I'd returned, and that influenced me to purchase in a brick and morter building from people I could identify and grab by the collar if needed.
film cameras from
KEH,
Ebay, Craigslist, yard sales, Goodwill online, camera shops, antique malls and shops, yard sales, etc. from coast to coast.