I'm sorry but for $400 those things should at the very least be gold plated. Honesty, I'd be surprised if anyone's actually ponied up that much money for one of those keys.
I get where your coming from (and this is strictly my opinion), but unless your planning on wearing it as bling, the key is gonna either be in your pocket or in the ignition, so that'd be a hard pass for me. But hey, I could be wrong and you could be onto something. And if you do get some interest, please be sure to follow the classified section rules: **FORUM RULES FOR POSTING TO CLASSIFIEDS**