I have bought the Monica Vinader heart locket. It's engraved so I wanted to send it off asap and I was getting overwhelmed by the choice of chains. So now that I've ordered the locket, I am wondering if it's worth getting the chain from elsewhere. I am looking for a sterling silver adjustable (18" to 20") and apart from not having the MV initials, I just don't see what the point of paying those prices would be. Or am I being cheap? (it is for a gift but my DD won't mind).