He is trying to beat the price down so he can flip it for 400+. A lot of Craigslist buyers are just plain flippers. Walk away. Try a new Craigslist add with the added details. As for 3 versions, well of course, yours will be the lowest, it is all part of the flippers scam. I won't do Craigslist due to all the flippers and their low, low offers. Ebay is not the sellers best friend, it will go out of it's way to protect the buyer-but not the seller. I have a newer version of the Marantz with atmos. The 400 price point is solid and should not be negotiated lower. Don't get me wrong, I purchase from Ebay and Craigslist both.