This would be a good one to take to that destroying stuff merchant. There is never a line. Get the fire flares removed. Because as it stands, they will cause crit padding on the base armor to be halved on hits to the neck. Since you can't neckbutt, I dont think thats worth it.
I think its worth about the same as a +7 brawling bonus torc would be. Personally I think there is more utility for an aventail than a torc, because you can get resistance added to an aventail. So id say 5-10m.
Your mind is completely fucked. It is imperative that you unfuck immediately!