I definitely wouldn't unravel it or toss it.
It absolutely has value with the regenerations on there. Plus it's neither prized, antique, or brittle. That kilt will last forever.
Anyone who can get their hands on 3 Legendary Pieces and enhances them is going to be at all 70s. Then most likely there going to be looking for pieces with high regeneration to fill out the rest of their suit, which is where pieces like this will come in handy.
I already have similar pieces or I'd make an offer. If it was damage eater instead of cold I would definitely make an offer.
Again, I wouldn't throw it away or unravel. Toss it on your vendor and liquidate it or hold onto it.