Well, I drove to one Shell on Monday night, $1.50/L for E10. Drove 5 minutes to another one, $1.44/L for E10. Filled up 95RON for $1.57/L (the latter Shell didn't have 98, was in my Mum's 2012 Corolla). The earlier Shell had 98 for $1.70/L.
Go figure.