What Deduction For Straight Edges On Parcel Post Q1- Q12 ?

Regarding the U.S. Parcel Post set -- Scott Q1 - Q12 ....what is the generally accepted deduction for a straight edge on an MNH stamp ...and is it even more for two straight edges ? ... are perfins still considered a roughly a 20-25% deduction also ? Esp on Q10 - Q12..?
Also out of curiosity how do straight edges affect the value of used stamps ?

As always - your opinions and suggestions are greatly appreciated.

Hi Jimdendy,

There is no demand, and limited supply, for straight edges so no generally accepted deduction.

You can check the American Philatelic Society's Stamp Store https://classic.stamps.org/StampStore

Everything there is priced by the APS collectors who sell there; sometimes over optimistically, sometimes very wisely.
There are no prices realized, but you can see how long the items have been listed.