Recently? 2019 TS was $9 for 4 gallons IIRC maybe cheaperMy local guy charges $11 for a fill a runs that sucker till it’s pissing gas out.
I dont have a “local” place. Its echange or set price for fill at achuboun / nursery , theres a large gas place right around the corner thats always expensive for anything less than 100 gallons.