//copper longsword is the +0 variant, bronze is +1 to damage, iron is +1 enchantment bonus, adamantium +2 and mithril (dream on

) is +3.
Just for your information, hope it helps in the future.//
*Tar sees the note on a wall in one of the Mistonian cities on the south parts of the continent, and decides to write a reply to the note's bottom*
That depends on if you're buying from a guild or a freelancer, typical prices for a guild forged iron longsword would be some 2000tr, yet the freelancer tend to make them cheaper in order to keep themselves in business. Ask around, there are bound to be some weaponsmiths at Hempstead, lurking around the pool.
*Signed*
~Man in chain shirt
*With a small chuckle for his signature pun of sorts, he walks away with a quick pace that he is used to keep*