Hello Everyone,

I have started my GRE preparation just two days back.
I came across a sentence completion question which contains a following sub sentence.

" Not because there are doubts about its authenticity or even great reservations to its price. "

according to me this sentence tells us about something whose authenticity is doubtful and have high price.

I read the explanation of this sentence that is quiet opposite to what I thought, according to explanation the thing is authentic and cheap.

can you please explain what effect not because has caused here.

Thanks in advance