I got a gold max chaos axe with +14% while enemy hexed - not while your hexed. I have not previously heard of or seen this mod.
Its not overly exciting if it only goes to 15%. If it goes to 20%, then that would probably be more attractive than 15>50 for many builds.
I do not know how to post a screeny.
A

The buyer could be an e/mo or e/n and use the same weapon. And as for the price, mine was max, 19% on healing and 18 on death.