I don't know if you noticed but if all the people only accepting one exact trade never get there deals to go through. What are the odds that the few (if any at this point) people wanting to trade away their masterwork longsword just happen to actually want a masterwork red tassel spear. Think about it. But anyway I might consider trading a masterwork langes messer for it which has more speed, more cut, and more pierce damage when used 2handed (it gets speed/damage bonus from 2handed grip) than a longsword has.