PPSJ you're probably looking at $1200-1300 reseller, though with the double PP it could get more interest. My advice would be to wait and hold in hopes of seeing a brighter aftermarket. Check out the Chinese LLLL threads for further insight.
XIXK will likely be in the ~$300 range, +/- with the -side favoring.
I was going to put FIFX in the same class but "FX" is a nice acronym and for a variety of reasons this one could have end-user potential. Lots of potential in fact.
FIFX.COM - This is the only one in the list that holds value because of the "FX" suffix. I've sold many, none less than $500 before the Chinese craze. $500~
PPSJ.COM - $1200~ (now, but looks bleak)
XIXK.COM $350~ (now, but looks bleak)