Based on Motogs Crafting Calc, which is accurate for every other item i have checked that exists on this server the sellback value on these fortified shortbows is too low. Below is the costs associated with level 26 fortified short bow, which is even worse of a loss as you go up in material tiers to craft level 51 versions.
Level 26 Fortified Shortbow
Cost: 5g 65s 92c
Sellback: 4g 24s 44c
Motogs Listed Sellback for this item is : 4g 32s
http://motogs.redemptionofdivineharmony.net/hib_weaponcalculator.php
Level 26 Fortified Shortbow
Cost: 5g 65s 92c
Sellback: 4g 24s 44c
Motogs Listed Sellback for this item is : 4g 32s
http://motogs.redemptionofdivineharmony.net/hib_weaponcalculator.php