Still for sale...
How much is it worth and does it even attract any attention/visits?
There is no site on it or whatsoever.... so I can not really answer your question.
But I strongly believe that this is really that one of a time domain opportunity, that's why I registered years ago. Try find any .com available on the adult/sex market and you'll see what I mean. This one is really really interesting and very easy to market (all you need to do is to make the wordplay sextrimonials viral, and you have won).
I am not willing to sell for anything below 1.5 BTC (which looking at the 5-6 figure domain sales for a still available premium domain - ONLY DOMAIN, no site -, is really really nothing).