How long does it usually take for Sony first party games to drop in price?

[RiceQuakes]

I really want both Ratchet and Uncharted at launch, but, if I remember correctly, it didn't take long for past games (in each series) to drop in price. Am I wrong?

 

[hotstud19us]

Uncharted went cheap because it was/still is included with a bundle (digital and disc). I don't think rachet has a bundle. And I'm sure uncharted will be available for around 35-40 a few weeks after launch. Since that is probably one of the biggest games for the ps4. Ratchet it is going to be hard to tell. Since it is a remake/re-imagine of the first game. Not sure how well it will sell.