Yeah I started a thread about that a few months ago.
GN 50 + is something like $1,500.00 (including intl shipping etc)
Some Black Edition Puma is listed for $1450.00 on EBay.
These prices are set at this point because there ARE some crappy or out of form players who are ready to pay this much, in a desperate effort to get into double figures.
In my personal opinion,
Brand name, shape, willow number of grains, edge size, concaving, handle shape, duck bill toe, stickers, number of grips, counter balancing, Kohli shape, Tendular profile and what not, are ALL secondary.
What matters the most is, how does the bat feel in your hand in its natural state, before you start dressing it up with additional auxiliary or cosmetic stuff.
an off the shelf $100 grade 2 bat with the right feel and pickup may help you perform better than a $2000 L&W Signature.
Once the bat feels good in hands and it gives the right indication to your brain about the exact location of the sweet spot then it all boils down to your skills against the bowler's skills.