I have been dealing with B&H since 1972. The only time I deal elsewhere is with Best Buy if they have something in stock that I need. If you buy from Amazon they have a number of dealers but you don't get the service you get from B&H.
I am presently using a 6D MKII and a 80D. Both are great with the 6D MKII being favorite. I am looking at adding an EOS RP for travel and to use my existing EF Lenses. If anyone has one I would appreciate you review of the camera.
Yes. I have had both versions in Canon Mount. Version 2 is much sharper and will focus in lower light then Version 1 did. I find it performs so well that I have it mounted continuously on a Manfrotto head and tripod with wheels so I can roll it to where I need it to photograph birds near my home.
When I am selling photo gear I always use KEH Camera. They are great to buy used equipment or to sell it. They have always been great to deal with.