Canon 1Ds III pricing

I'm going to NY for a few days at the end of August and I'm planning to buy a new 1Ds III. The price in the US is still cheaper than here in Canada.

I've purchased from B&H and Adorama before without any issues and I always thought these 2 dealers had the best prices in town, at least from all authorized retailers...

Now, doing a bit of research, I noticed some significant price differences for this camera, starting at $6,850 going all the way to $7,999.

Dell Home $7999.99
US1Camera $6835.99
dbuys.com $6865.00
J&R $7849.00
B&H Photo-Video $7849.95
DigiCombos $6950.00
42nd Street Photo$7039.99

Are US1 Camera, Dbuys.com or 42nd Street Photo reputable dealers. I know there is a lot of mickey-mouse type of dealers in Manhattan, so I don't want to make the big mistake of trying to save $800 and end up with a 1Ds III lemon...

Thanks in advance for your feedback.