I''m very much enamored with the Niessing Open End Tension setting in 18k grey gold (would be looking for a .5-.65ct diamond). How much should I expect to pay for this setting? Can I expect to negotiate the price down from the listed price? I''ve been quoted around $3000. Thoughts on best places to get Niessing settings? I would prefer to deal either locally here in Boston, or out in Los Angeles where I''ll soon be moving. Very new to all of this, so appreciate any help!