Gas Prices Down Again Yarmouth, NS, Canada / Y95.5 News Sep 22, 2017 | 7:58 AM A litre of regular self-serve is selling for $1.09.2 cents a litre in parts of Yarmouth County. That’s a drop of of 6.7 cents. Diesel also went down by just under 3 cents and is selling for $1.05.3 cents a litre.