Who will work on a Canon Rebel XSi and a Canon RebelT6i

[longbow5]

My XSi stopped taking pictures. I can fully charge the battery, and it will take one or two pictures then quit. I can remove the battery and put it back it gives me a card error, there is nothing wrong with the card. The Screen on the back of the T6i quit working so you can't adjust anything on the camera. It is set to take multiple photos and since the screen doesn't work it is stuck on that. I bought my first canon in 1982. It was a AE1-Program, and it still works. Both of these digitals are broken, and the 42-year-old 35 mm still works. I ordered a new battery for the XSi just to see if there is something wrong with the original. The easy answer is to just buy a new camera but the Canon EOS Rebel T7 is the only one I could afford, and I really can't afford it right now. If I buy it will they stop servicing, it in a year or two like they have my other two cameras? Should I go with another brand after using canon for 43 years? 

[shadowsports]

Best buy is authorized Canon dealer.  I purchased my T6s and many lenses there over a decade ago.  When you purchase online from a marketplace seller, it must say ships from and sold by "the authorized dealer name".  Otherwise the likelihood of grey market is high.

Canon does not maintain a store on Amazon. Amazon creates "stores" for their larger volume vendors.  Amazon itself is an authorized dealer, but, it's vendors stores are all marketplaces .  if you purchase on Amazon and it doesn't say ships from and sold by Amazon, you are probably not going to be buying from an authorized dealer.  Always read the fine print, and pay attention to the details.  The safest thing to do is to buy directly from Canon or from B&H, Adorama, Best buy in store, etc.  All purchases intended for sale in the United States will have a US warranty card in the box.