@Birrettagirl - "Everything is worth what its purchaser will pay for it." Publilius Syrus (~100 BC)
these are not overpriced, they are only obtainable in battlefields that take a good deal of work to even gain access to, which limits the supply, and are obviously in demand for weapon trials, so if you don't like the price, wait till it drops, but in the meantime, learn how markets work on supply and demand, and how that effects the price of specific items =)