eBay is offering 10% off Southwest gift cards.
Limit of 5 per customer.
Southwest only allows 4 forms of payment per transaction. We recommend buying 3. For example, if your flight costs $650. You can use 3x $150 gift cards and pay the rest off with your 4th payment type (most likely your credit card).
Go to eBay and add a $150 Southwest Gift Card
Wait for Southwest to have an airfare sale (usually on Tuesdays) and pay for it using the gift card