Is this a gramatically correct statement?
"I believe you that the Nikon D7000 is a good camera, but there are poor countries where not everyone afford one."
Its wrong
Yes that is a grammatically correct statement. However you spelled grammatically wrong =P
This sounds better.
I believe that the Nikon D7000 is a good camera, but there are countries where not everyone can afford one.
No it is not a grammatically correct sentence.
"I believe that the Nikon D7000 is a good camera. There are poor countries where not everyone ia able to afford one."
Where not everyone can afford one. There's a can in there.
I believe you when you say that the Nikon D7000 is a good camera, but there are countries where not everyone is able to afford one.