Can't justify a buyer offering hundreds less, especially if the seller is asking a reasonable price for his item. If you truly want something, just offer the full price and you have secured it for yourself. On the other side of the coin I have noticed that some sellers are asking a ridiculous amount of money for their gear as if they were trying to retire tomorrow. Right now there is a McCormack DNA-1 with silver upgrade, the seller is asking over two thousand dollars for it. A few years back I was selling those for $900.00 to $1200.00 plus shipping.
This is just an observation on my part and truthfully a seller can ask any price he or she wants, don't mean you will get it. Or possibly as I stated above the selling price was inflated so when low offers come in the seller will get exactly the amount they secretly had in mind.