I just bought a Speedway $100 gift card for $92, so it's like improving my gas mileage by 8%, or getting about 20 cent discount per gallon.
I do not have experience with this Ebay seller, however the seller has 99.5 % positive rating. ( I got the card in the mail in about a week.)
This seller has $100 gift cards from many gas sellers from $92-94. Speedway, BP, ExxonMobil, ChevronTexico, 76, Phillips
The ebay listings for the discounted cards come and go from what I can tell. There are also full price gift cards - so if you do not see the discounted ones it is because the price "war" might be off for the time being.
This link might only display the discounted cards
( It searches on "gas gift card only" and it works now but it might not work later if they stop using "only" on the discounted card listing. )
Edited by obob, 27 November 2017 - 11:56 AM.