Help: Feedback Needed for Monitor Audio Silver RS Pricing

Hey guys, I've been out of the loop for the last six years or so since purchasing my Monitor Audio Silver RS-6 (left and right tower), RS-LCR (center channel), and RS-1 (two surrounds) for my bonus room home theater setup. We are moving into a new home where I won't have the room for them, so I would like to sell them on here but have no idea what would be an appropriate asking price. The speakers are rosenut wood, were purchased at the end of 2010, have been very gently used and are in fantastic shape. I have been trying to search around to get a feel for an appropriate asking price, but I really have no idea. Any feedback would be greatly appreciated. Oh, and I apologize if this isn't where I should leave this question. Thanks in advance for any feedback!