This stuff could be so helpful for new chars/players, like Maple Weapons. Why make them untradeable? T_T
Leaving the flags untradable gives a good gachapon balance though. CBD already boasts a nice prize pool with its Ele Wand 7, White Raccoon Mask and Taru Totem so I'd imagine making them tradable would tip the scale a bit.
They're not going to be worth a lot of money tho, since they'd be easily replaced by Maple weapons. See the other "beauty" weapons from other random Gach (like umbrelas, boards, tubes, etc), that people just dump/npc. Also, I noticed that Bowman, Thief and Mage weapons requires the secondary status, so RIP Lukless Mages/Dexless Thieves. But they're a good looking thing for mules, with which you're never going to gach. And for people like me, who likes to maintain a Random-Equip Collection, they'd be a good addon: