If this is true then game stores might as well not sell anything PS3 except accessories because that is the only thing they could profit off of. New games and Systems don't have much mark up while a used game can have a mark up of almost 60%.

That would stick it to Sony and I am sure they are aware of this. If this is true it might be for Japan only where there was a ban on selling used games for year and it was lifted 2 years ago...or something.

I don't think it is true at all. It would be a shot in the foot and lock out codes wouldn't work unless the disc gets written to or it forces you to go online. Both of which would kill sales in general and the consumer would just go to the 360.