The discussion of item file changes ended up split between three threads, with a spirited debate that jumped from thread to thread, and the eventual uploads then happened in an essentially unrelated thread. 
But I think we have reached a consensus now, so I want to post a revised item file reflecting what was discussed, revised with today's scope accuracy change to match Grey Roger's suggested 120, and see if anyone has objections to this version, or whether we have agreement.
Summary of changes in current file:
1) skill boost for fencing added to repel boarders book, and price doubled, by Grey Roger
2) skill boost for luck from lockpick increased to +2, by Tingyun
3) Melee weapons except for unique or quest swords and jeweled dagger all have prices reduced to 50%, reflecting discussion among Pieter and other team members, file prepared by Tingyun
4) moved/added item changes reverted from last update to preserve save compatibility, by Tingyun (temporary measure for while we investigate the glitch and until we don't mind hurting compatibility)
5) No Scope longrifle stats changed from:
accuracy 20 damage, 50-150, 2 pb per shot, 30 sec reload
To:
accuracy 80 damage 150-200, 1 pb per shot, 50 sec reload
taking inspiration from common rifles of the 1700 era and differentiating from musket
It remains a one-time, player only quest item.
6) Accuracy of scope version increased from 80 to 120 per Grey Roger's suggestion
Finally, in testing right now, separate files for merging linked:
1) New Baker Rifle, stats by Grey Roger, files prepared by Tingyun:
Damage 150-250, accuracy 120, 1 pb per shot, 50 reload time
Made available in Napoleonic period as a rarer alternative to musket, and implemented in Hornblower storyline
Rifle stats | Page 2 | PiratesAhoy!

But I think we have reached a consensus now, so I want to post a revised item file reflecting what was discussed, revised with today's scope accuracy change to match Grey Roger's suggested 120, and see if anyone has objections to this version, or whether we have agreement.
Summary of changes in current file:
1) skill boost for fencing added to repel boarders book, and price doubled, by Grey Roger
2) skill boost for luck from lockpick increased to +2, by Tingyun
3) Melee weapons except for unique or quest swords and jeweled dagger all have prices reduced to 50%, reflecting discussion among Pieter and other team members, file prepared by Tingyun
4) moved/added item changes reverted from last update to preserve save compatibility, by Tingyun (temporary measure for while we investigate the glitch and until we don't mind hurting compatibility)
5) No Scope longrifle stats changed from:
accuracy 20 damage, 50-150, 2 pb per shot, 30 sec reload
To:
accuracy 80 damage 150-200, 1 pb per shot, 50 sec reload
taking inspiration from common rifles of the 1700 era and differentiating from musket
It remains a one-time, player only quest item.
6) Accuracy of scope version increased from 80 to 120 per Grey Roger's suggestion
Finally, in testing right now, separate files for merging linked:
1) New Baker Rifle, stats by Grey Roger, files prepared by Tingyun:
Damage 150-250, accuracy 120, 1 pb per shot, 50 reload time
Made available in Napoleonic period as a rarer alternative to musket, and implemented in Hornblower storyline
Rifle stats | Page 2 | PiratesAhoy!