Price compare 2014/2015

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Hi

I want to ask :

Can you please compare 2014 prices and 2015 prices ?

For example;

How much was it cost 5N , 6N.com at 2014 ?

How much was it 4L.com at 2014?

Can you give % about price increas ?

And what do you think for 5L.com / 7n.com prices for 2016 ?

Thanks