Place near me has 20lb. propane refills for $6.99, but they have a sign stating they fill to the same capacity as the propane exchange places. With my one tank having a gauge it shows about 3/4 when I fill there. Another local place charges $11.75 and the gauge will register 100% and I can tell the difference in carrying.
Our Costco doesn't carry propane, but is the cheapest around for gasoline, and has become a favorite of ours for a lot of products since it opened. Costco started on the West coast and worked its way East.
2015 Shamrock 231KSS, Oyster shell
2016 Chev Silverado LT Z71 Ext. Cab, 4x4, 5.3L V/8
Reese Straight Line WDH, 2000W Honda Gen.
2 Old Town kayaks & 2 Boston Terriers - Zoey/Gonzo
Lar & Ruth
55 nights camping in 2015, 45 in 2016