Its the default pvp warhammer skin, its a hammer so not incredibly popular atm, high req, -10AL is a bad condition.
75-100k seems way over the top to me, if i got that as a drop id probably merchant it, rare named common skins are often the same, swap clubs are another example, rams hammer skin but rare name, ive seen perfect ones go for 20-30k.
I think you wispered me in-game about this unless i am mistaken. I turned it down as i have a unconditional warhammer with same skin so its kind of pointless buying any more magmas arm skinned ones. And I dont like -10 on hammers.
-10 armor for hammer is awful (no offense) as hammer warriors already have reduced armor due to lack of shield.