Why so many used focals?

The old engineering saying that if it looks right it usually is, is usually wrong. That thinking produced lousy aerodynamics on cars. It produced a lot of lousy speakers, especially in the 60's and 70's. It's produced plenty of architectural and structural failures. Good engineering hardly ever produces things of fine esthetic beauty. 

Focal gets sold sometimes because owners can't find a good system match (amp, dac) - they can sound ok, or amazing, depending on the rest of the system.

Also, focals have open but not bright (fatiguing) sound. 
Are there some speaker cable brands and models that are proven to work well with Focals, specially ones with Be tweeter?  

With manufacturer warranty, you can buy Focal speakers at 20% - 30% discount. Without warranty, you can buy them at 40% discount. For good like new speakers, they're sold at 50% of the retail price. I have a pair of Electra 1038 Be, CC1008 center speaker, 3 SR 1000 Be, and 4 IC1002 ceiling speakers. In my office, the little Naim Unitilite is powering a pair of 1008 Be bookshelf and the Dome Pack 2.1. When I don't want to disturb my wife, I wear the Clear Pro or sometimes the new Elegia. There are many great speakers out there as you have listed them, I like Focal better than the B&W.

I was fortune enough to get a pair of Sopra No2's just after they were available in the U.S., over three years ago, and in my setup (to me) they sound fantastic!

In my search for speakers I auditioned the Sopra's driven by some modestly powerful amps, one's that didn't sound "smooth" and didn't like what I heard.

In my search I also auditioned the Sopra's in a small room and didn't like what I heard.

But in my 24x26' room, and a 450 wpc McIntosh amp behind them, they sound awesome!  The bass that they have is very good, but I decided to add a pair of very capable sub woofers.

As for why so many Focal's seem to be for sale, I think you'll find that to be true of a number of brands that sell well.  With this hobby, I find a lot of us audiophiles try new equipment and move on to try something different.

philkoan: What body part do you pull those numbers out of? Even 20% off Focal speakers would be pushing it. I don’t know of a speaker line with a smaller margin. They sell through a distributor and do NOT have the same margin as other speakers . Seeing some discontinued models or finishes at Music Direct etc at 30% off doesn't count.  ANY manufacturer presents scenarios like that at times and that is in no way unique to Focal.

I could see 20%~ off some of the higher end Utopias as there is more to play with, but otherwise, you are just spreading hilariously false information. I have seen the price sheets.

This place....