If you're looking to move from PS3 to PS4 in order to get all the goodness of the 1.3 update that is coming to the PS4 version, now is the time. Or if you already have it, and your friend has been waiting for a deal, call him up because the PS4 version is on sale for only $4.
Get it in your hot hands here: https://store.playstation.com/#!/en...tion/cid=UP4040-CUSA00740_00-TERRARIA00000001
The website says, "This price is only available from July 20, 2017 11:00 am to July 24, 2017 11:00 am"