Today I was in an out of town music store and ran across what looks to be a killer deal on an NV610. It's a consignment deal that's been in the store for a bit and the rumor is that they are willing to be talked down from what it's going for. I played through it (with a Traynor YBA200, what a great combo THAT was) and it sounds like there's nothing wrong with it. My question is, how much is a good used price on these? The only references I can find are in the gear review section here and one Classifieds post for one going for $650, which is incidentally right around what they're asking for this before the talking down process. Can anyone tell me at what point it becomes a sweet deal and at which point it becomes an offer I can't refuse?