.ws has been around a lot longer than the new extensions, but has always been a flop when it comes to prices. Adding a bunch of new possibilities doesn't make it any more valuable than it was.
I've got a couple myself. One I paid $700 for foolishly years ago when I got carried away at an auction.
Stick to .com or be realistic in what your potential is with most of these non-premium extensions. Most solid keywords are going to be the same XX to low XXX range.