Why lots of B&W Nautilus for sale used?

Additional: I guess the Nautilus tweeter is better, but the rest of the speaker I do not know. Build quality is the other question. The Cherry veneer on the Nautilus is attractive, but they still do not look as solid as the Matrix models to me. The Matrix has a solid heavy grill design to help the sound dispersion. The Nautilus has a flimsy plastic grill much like the 600 series. I have not done a direct comparison of the two. What do you guys think?

Thirdly, is the Nautilus 803, 804, 805 worth the 60% increase in price in your opinion? Or triple what a mint used pair of Matrix go for??

I have a pair of N805s and it would be very difficult to convince me to sell them. I carefully considered many higher priced speakers but the B&Ws remained my favorites. The build quality seems exceptional.

Sugarbrie, . It does't get built much better than my Nautilus 805's. It stands to reason that a speaker with rave reviews like the 805's and 803's are bound to get a lot more buyers, and therefore a few more sellers. My friend has the big Silver Signature series B&W's, and even they are not significantly superior to the 805's ( a little more bass). The Matrix series is not a contender in any way IMO. Also, I think many of the B&W 's for sale are by people upgrading to another B&W. I use a REL Strata III sub with mine, and I suspect some of the sellers may not be using a sub, or perhaps have equipment that is not up up to the level of the 805's. If you are thinking of getting a pair of 804's or 805's don't think twice, they're alright!