Keep an eye on Newegg.com. got my x4 standard edition free after $40 rebate. Also, look out around the time of a new release (ex. PSPX5) for bargains on the previous version.
Personally, im waiting for them to polish up the Aftershot pro. I tried the free trial but seemed rough around the edges. I think it has the potential to be a Lightroom competitor. Aftershot and PSP would be a nice workflow setup that would be a fraction of the cost of Photoshop and Lightroom once the software matures.
Cheers. Cheers to what we possess within ourselves. Cheers to the possibilities of this day.