eBay is currently selling $100 Cabela's gift cards for only $80 shipped. That's $20 for absolutely free! eBay typically always has gift cards like this on sale – in fact, we even have a section here on HIF that displays them all! But 20% off is a big discount, even for eBay.
These are physical gift cards that will be shipped via USPS first class mail. I never understood why mail gets to fly first class while I'm always stuck in coach, but I guess that will forever remain one of life's greatest mysteries.