Supply and demand would be my guess. I haven't seen any around locally and most the online retailers when I looked last where out of stock.
Honestly though I really didn't like my PSL. The barrel would heat up after a few rounds and open the groups up even more in the already wide groups I was getting from that crappy surplus ammo I was using.
If I were to get another semiauto 7.62x54R rifle it would have to be an all matching tokarev(I collect milsurps) or much more likely a VEPR.
I would buy a VEPR over a PSL any day of the week.
Practical before tactical.